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Basic  |
Wicd - is an open source wired and wireless network manager for Linux which aims to provide a simple interface to connect to networks with a wide variety of settings. Some of Wicd's features include:
- No Gnome dependencies (although it does require GTK), so it is easy to use in XFCE, Fluxbox, Openbox, Enlightenment, etc.
- Ability to connect to wired and wireless networks
- Profiles for each wireless network and wired network
- Many encryption schemes, some of which include WEP/WPA/WPA2
- Remains compatible with wireless-tools
- Tray icon showing network activity and signal strength.
There are instructions for installing Wicd on Ubuntu and Arch on the Downloads page, although it should work on any Linux distro.
UMTSmon - is a tool to control and monitor a wireless mobile network card (GPRS, EDGE, WCDMA, UMTS, HSDPA) in a laptop running the Linux operating system. It handles PIN codes, operator choice (roaming), signal strength and network statistics, sending/receiving SMS.
Vodafone Mobile Connect Card Software for Linux - is a software suite for 3G datacards which works on multiple distributions of the Linux Operating System. The software allows managing connections with GPRS, UMTS, and HSDPA. It also supports SMS, access to contacts and diagnostic information. This open source application is free to download and distribute.
launch2net for Ubuntu Linux - is a professional mobile Internet Connection Manager for Ubuntu 8.10 and 9.04 users. launch2net will recognize your type of modem or ExpressCard as well as the SIM card and does not need intricate driver installations or configurations. The clean GUI displays the most important information at a glance, like network information, signal strength, online time and data throuput. A well arranged statistic window delivers detailed information about the online time and data consumption of each connection in addition to the modem type used. An icon in the task bar offers access to the most important functions of launch2net for Ubuntu Linux.
WvDial - program that connects your Linux workstation to the Internet as easily as possible.
ISDN 4 Linux - is a set of kernel modules which are part of the Linux kernel. In addition, the package isdn4k-utils contains utilities to make use of ISDN specific features. Here you can get latest Utility packages.
RP-PPPoE - Roaring Penguin's PPPoE Software for Linux, NetBSD and Solaris systems to connect to PPPoE (DSL) service providers.
AVM - ADSL, ISDN, Wireless & VoIP - drivers for AVM products (FRITZ!Cards, Fritz!Box, Fritz!WLAN, BlueFRITZ!,...).
ISDN Fritz PCI 2.0 unter Debian - Diese Anleitung beschreibt, wie eine AVM Fritz PCI 2.0 ISDN Karte unter Debian unter Verwendung von CAPI4Linux in Betrieb genommen werden kann. Angewandt wurde diese Vorgehensweise unter Woody (Debian 3.0) mit Kernel 2.4.18 sowie Sarge mit Kernel 2.4.20.
mtG-CAPRI Server - Mit Hilfe des mtG-CAPRI Servers machen Sie die Funktionen der ISDN-Karte mit CAPI fuer alle im Netzwerk vorhandenen Client-PC mit Windows verfuegbar. Diese koennen dann auf die ISDN-Karte so zugreifen, als haetten sie selbst eine eingebaut. Also quasi so eine Art KEN!-Server mit Linux.
mtG-CAPRI - Virtual ISDN-Interface. The virtual Capri is available in a 2-channel version for free download. The four and more channel version can be purchased based on a price model for the number of B channels used.
CAPI 4 Linux, CAPI 4 Hylafax and Patches (url1) - contains the CAPI2.0 driver for linux and usefull information and tools for capi4linux.
CAPI 4 Linux, CAPI 4 Hylafax and Patches (url2) - contains the CAPI2.0 driver for linux and usefull information and tools for capi4linux.
Dialow - is a "Smart Surfer" for Linux. It allows the user to choose the cheapest ISP at any given moment. It uses pon to connect to the web and provides a dialog frontend. It is written in Bash and Gawk. ISP information is retrieved from different providers.
slyLCR - ist ein Least Cost Router, der den guenstigsten Tarif fuer die gegebene Zeit berechnet. Der Benutzer wird vor dem Einwaehlen gefragt, wie lange er vorraussichtlich Online sein moechte, wodurch der Fehler mit der Einwahl Gebuehr umgangen wird, da diese mit gerechnet wird.
Optisurf - ist ein "Smartsurfer" fuer Linux. Das Programm waehlt sich ins Internet ein und bestimmt die im Moment billigsten Anbieter für Modem und ISDN ohne Anmeldung mit und ohne Einwahlgebuehr.
Onlinecalc - summarizes your online time, transfer volume, and number of connections made to your ISP with pppd. It allows you to print out statistics concerning different date and time ranges. A CGI version of onlinecalc is also available.
pppusage - summarizes average and total transfer volumes, number of connections and average and total online time for all logged PPP connections.
netcount - is a package for logging and displaying PPP network traffic on Linux machines. Logging is done via a small shell script which is called during the ip-up, ip-down and system startup processes and from cron, while analysis and printing is done by a program written in Python.
pppstatus - was developed for Linux users that are usually in console mode. It is a simple, easy to use program for displaying commonly needed / wanted statistics in real time about ingoing and outgoing TCP/IP traffic that is usually hard to find, with a simple, efficient interface.
vnStat - is a network traffic monitor for Linux that keeps a log of daily network traffic for the selected interface(s). The traffic information is analyzed from the /proc -filesystem, so vnStat can be used without root permissions.
IPTrafficVolume - is a simple ip traffic volume counter which uses linux kernel iptables to log internet traffic in a highly customizable manner and includes a cgi interface to display the traffic statistics on a web server.
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| Browser |
Opera - provides you with the speed, flexibility, features and security that you demand from a Web browser, while integrating seamlessly into the Linux environment.
Opera.deb Repository - This repository contains Opera Debian packages for the i386, sparc, and powerpc architectures.
Plug-In Documentation for Opera for Linux - Software companies are developing plug-ins at a phenomenal rate, so check back here frequently to download the latest programs.
Konqueror - is the Web Browser and File Manager for the K Desktop Environment. It supports Java applets, JavaScript, CSS1 and (partially) CSS2, as well as Netscape plugins (for example, Flash or RealVideo plugins).
Google Chrome - is a web browser that runs web pages and applications with lightning speed. It is designed for efficiency and ease of use.
Chromium - is an open-source browser project (behind the Google Chrome browser) that aims to build a safer, faster, and more stable way for all Internet users to experience the web.
SeaMonkey - The SeaMonkey project is a community effort to deliver production-quality releases of code derived from the application formerly known as "Mozilla Application Suite".
SeaMonkey deutsch - Diese Seiten werden vom deutschen Uebersetzungsprojekt fuer SeaMonkey und das Mozilla-Paket betrieben. SeaMonkey (bzw. Mozilla) ist eine moderne Open-Source Web- und E-Mail-Suite, die Module fuer Browser, Mail & Newsgroups, Erstellen von Webseiten, Chat und einiges mehr enthaelt.
Mozilla Firefox - a redesign of the Mozilla browser component is built with Tab browsing, popup blocking and a number of other seamless innovations.
Mozilla Firefox deutsch - Webseite des deutschsprachigen Mozilla Firefox. Mozilla Firefox ist ein Browser, der auf dem bekannten Mozilla aufbaut, im Gegensatz zu diesem aber auch für Endanwender entwickelt wurde.
Portable Firefox - Here you find the scripts to download and create a portable version of Mozilla Thunderbird+Enigmail and Firefox for Linux.
Portable Firfox (Deutsch) - Wenn jemand mehrere Computer nutzt und trotzdem nicht auf persoenliche Einstellungen verzichten moechte, kann eine portable Version verwendet werden. Diese wird auf einem USB-Speicherstick installiert und direkt dort gestartet. Dabei werden saemtliche Benutzereinstellungen und Daten auf dem Stick und nicht auf dem Computer gespeichert.
Firefox Extensions - Extensions are small add-ons that add new functionality to Firefox, from a simple toolbar button to a completely new feature. They allow you to customize Firefox to fit your own needs and preferences, while letting us keep Firefox itself light and lean.
erweiterungen.de - ist das zentrale Portal fuer deutschsprachige Erweiterungen fuer Firefox, Thunderbird, Mozilla Suite, SeaMonkey, Sunbird, Nvu und Songbird.
Mozilla Plugin Support on Linux (x86).
Plugins and Mozilla Firefox (Linux).
Lightspark Flash player - is an alternative Flash Player for Linux. Why Lightspark?
- JIT compilation of ActionScript to native x86 bytecode using LLVM
- Hardware accelerated rendering using OpenGL Shaders (GLSL)
- Very good and robust support for current-generation ActionScript 3
- A new, clean, codebase exploiting multithreading and optimized for modern hardware. Designed from scratch after the official Flash documentation was released.
Lightspark has been entirely designed after Adobe released the SWF file for mat doc u men ta tion, so no reverse engi neer ing has been done.
Gnash - is a GNU Flash movie player. Flash is an animation file format pioneered by Macromedia which continues to be supported by their successor company, Adobe. Flash has been extended to include audio and video content, and programs written in ActionScript, an ECMAScript-compatible language. Gnash can run standalone to play flash movies. Gnash can also run as a plugin from within most Mozilla derived browsers, such as Firefox. Gnash also has support for Konqueror. Gnash is 100% free software.
Adobe Flash Player - (former "Macromedia Flash Player ") allows you to deliver high- fidelity content consistently regardless of OS and client hardware specifications.
Moonlight - is an open source implementation of Microsoft's Silverlight, primarily for Linux and other Unix/X11 based operating systems. In September of 2007, Microsoft and Novell announced a technical collaboration that includes access to Microsoft's test suites for Silverlight and the distribution of a Media Pack for Linux users that will contain licensed media codecs for video and audio.
Moonlight for Debian - Debian is tracking the packaging process of Moonlight here.
mplayerplug-in - is a browser plugin that uses mplayer to play videos from websites. This plugin gives Netscape, Mozilla and Konqueror the ability to play videos off the net.
Galeon - is a GNOME Web browser based on gecko (the mozilla rendering engine). It's fast, it has a light interface, and it is fully standards-compliant.
Skipstone - is a Gtk+ Web Browser that embeds Mozilla's rendering component Gecko. It aims to be light and fast with few dependencies.
Epiphany - is a GNOME web browser based on the mozilla rendering engine. Epiphany's principles are simplicity and standards compliance.
Kazehakase - is a browser with gecko engine like Galeon or Epiphany. Kazehakase features tabbed browsing and remote bookmark (e.g. RSS) in menu or sidebar.
Beonex - is a free, full-featured mozilla-based web-browser and email/news client targeted at end-users.
Dillo - aims to be a multi-platform browser alternative that's small, stable, developer-friendly, usable, fast, and extensible. Dillo is a free-SW project in the terms of the GNU general public license.
Grail - is an extensible Internet browser written entirely in the interpreted object-oriented programming language Python.
Netrik - is the ANTRIK text-mode WWW browser, that comes with many innovative ideas making it very convenient, and several advanced features are planned -- the ambition is to create THE ultimate text mode browser.
Lynx - is a fully-featured World Wide Web text browser for users running cursor-addressable, character-cell display devices.
W3M - is a pager and/or text-based browser. It can handle table, cookies, authentication, and almost everything except JavaScript.
Links - is a text-based browser with support for HTML tables and frames. Links is free software released under the GNU General Public License.
Links2 - is a fast graphics browser that runs both on X11 and the Linux console framebuffer (Lynx-like). Links2 offers Javascript support (in text and graphics mode) with full user control over script run.
Elinks - is an advanced and well- established feature- rich text mode web (HTTP/FTP/..) browser.
HTTrack Website Copier - is a free and easy-to-use offline browser utility. It allows you to download a World Wide Web site from the Internet to a local directory, building recursively all directories, getting HTML, images, and other files from the server to your computer.
gHTTrack - is a GTK frontend for for Xavier Roche's "HTTrack Website Copier" for reading Web pages offline and/or for mirroring Web sites. gHTTrack is easy to use (no need to remember httrack command-line switches).
Getleft - is supposed to download complete Web sites. While it goes, it changes the original pages, all the links get changed to relative links, so that you can surf the site in your hard disk without those pesky absolute links.
WWWOffle - is a simple proxy server with special features for use with dial-up internet links. This means that it is possible to browse web pages and read them without having to remain connected.
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| FTP-Clients / Download-Manager |
GNU Wget - is a network utility to retrieve files from the Web using http and ftp. It works non-interactively, so it will work in the background, after having logged off. The program supports recursive retrieval of web-authoring pages as well as ftp sites. Wget supports proxy servers; this can lighten the network load, speed up retrieval, and provide access behind firewalls.
cURL - is a command line tool for transferring files with URL syntax, supporting FTP, FTPS, HTTP, HTTPS, SCP, SFTP, TFTP, TELNET, DICT, LDAP, LDAPS and FILE. curl supports SSL certificates, HTTP POST, HTTP PUT, FTP uploading, HTTP form based upload, proxies, cookies, user+password authentication (Basic, Digest, NTLM, Negotiate, kerberos...), file transfer resume, proxy tunneling and a busload of other useful tricks.
GnomeTransferManager - allows the user to retrieve multiple files from the web. These files can be retrieved in multiple parts and each part retrieved on a separate session that the user is connected to the Internet. This is most useful to users with dialup connections. The program performs this tasks using wget as it's back-end.
Snarf - is a command line resource grabber. It can transfer files through the http, gopher, finger, and ftp protocols without user interaction. It is small and fast.
ReGet - download utilities suite: ReGet Deluxe and ReGet Junior.
aria2 - is a utility for downloading files. The supported protocols are HTTP(S), FTP, BitTorrent (DHT, PEX, MSE/PE), and Metalink. aria2 can download a file from multiple sources/protocols and tries to utilize your maximum download bandwidth. It supports downloading a file from HTTP(S)/FTP and BitTorrent at the same time, while the data downloaded from HTTP(S)/FTP is uploaded to the BitTorrent swarm. Using Metalink's chunk checksums, aria2 automatically validates chunks of data while downloading a file like BitTorrent.
gFTP - is a free multithreaded (GUI-) ftp client for *NIX based machines running X11R6 or later.
LFTP - is a command line file transfer program. LFTP supports FTP and HTTP protocols.
Yafc - Yet Another FTP Client - is an ftp client intended to be a replacement for the standard ftp program. Features include directory cache, remote filename completion, aliases, colored ls, recursive get/put/ls/rm, nohup mode transfers, tagging (queueing), background downloading, and more.
NcFTP Client - is a set of FREE application programs implementing the File Transfer Protocol (FTP). NcFTP offers many ease-of-use and performance enhancements over the stock ftp client.
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| Webfilter and Cookie Tools |
Webwasher - consists of the three modules that filter content, protect privacy, and control access. WebWasher's standard filters prevent unwanted data objects on Web pages from being loaded, prevent information on users from being forwarded to third parties without the users' knowledge, and allow the user a controlled access to the Internet (wanted information gets through; unwanted Web pages or data are blocked).
WebFilter - formerly known as NoShit. WebFilter is a patch to Cern's httpd web server. This server can act as a proxy. This is commonly used in order to hop over a security firewall or to implement caching of web pages, but it can be used to filter the web as well.
Privoxy - is a web proxy with advanced filtering capabilities for protecting privacy, filtering web page content, managing cookies, controlling access, and removing ads, banners, pop-ups and other obnoxious junk. It is based on the Internet Junkbuster.
Middle-man - is an advanced HTTP/1.1 proxy server with features designed to increase privacy and remove unwanted content. It is easy to configure and manage Middle-man by an intuitive Web interface.
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| Mail, , & |
POP and IMAP troubleshooter - serves to diagnose and solve connection problems from client machines to email services. It reads the client configuration files, checks the individual settings, and then attempts to create POP, IMAP, and SMTP connections using these settings. The troubleshooter is coded in C++ using the Qt environment. It can be used generically, or can be customized for the demands of a particular email service.
Mutt - is a small but very powerful text-based mail client for Unix operating systems. It is a descendant of ELM, borrowing ideas from other MUAs, like PINE and Mush.
Pine - a Program for Internet News & Email - is a text-based Program for reading, sending, and managing electronic messages.
mutt-ng - (mutt next generation) is a fork of the well-known email client mutt with the goal to both incorporate all the patches that are floating around in the web, and to fix all the other little annoyances of mutt.
Gnus - is a flexible message reader running under GNU Emacs. It supports reading and composing both news and mail. In addition, it is able to use a number of web-based sources as inputs for its groups..
Wanderlust - is a mail/news reader for Emacs(en) apparently written from the ground up for IMAP.
Mew - is a mail reader for Emacs with security functionality including PGP, SSH and SSL. Mew is an acronym for "Messaging in the Emacs World".
TkRat - is a graphical Mail User Agent which works in an X11-environment. The current goals are more or less: easy to use but still powerful, reliable, should work well in a mobile environment (i.e. on a laptop:-) and to avoid software bloat.
Kmail - is a fully-featured email client that fits nicely into the K Desktop Environment, KDE. It has features such as support for filters, PGP privacy, inline attachments, drag and drop support of messages and attachments and support for multiple pop accounts.
Balsa - is a GNOME email client. It supports mbox, maildir, and mh local mailboxes, and IMAP4 and POP3 remote mailboxes. You can send mail via sendmail or SMTP. Optional multithreading support allows for non-instrusive retrieval and sending of mail.
KDE Kontact - is a Personal Information Management suite that can be used as client for different groupware servers. It provides an email client, calendaring, meeting scheduling, a task list, contact management and syncing functionality by integrating existing KDE PIM applications.
Evolution - is a workgroup information management solution for Linux and UNIX-based systems. The software seamlessly integrates email, calendaring, meeting scheduling, contact management, and task lists, in one powerful, fast, and easy-to-use application.
Sylpheed - is an e-mail client (and news reader), based on GTK+. The appearance and interface are similar to some popular e-mail clients for Windows. The interface is also designed to emulate the mailers on Emacsen.
Claws Mail - is an e-mail client (and news reader), based on GTK+, aiming for quick response, graceful, and sophisticated interface, easy configuration, intuitive operation, abundant features and xtensibility. The appearance and interface are designed to be familiar to new users coming from other popular email clients, as well as experienced users. Almost all commands are accessible with the keyboard.
gtkmail - is a GUI email client for X, written in C++ using the gtkmm widget set.
Pronto! - is a highly modularized GTK Mail Client written in Perl. It is a continuation of the development of the CSCMail project in Perl. Pronto! is Free Software released under the GPL License.
Mulberry - is a (commercial) high-performance, scalable, and graphically groovy internet mail client. It uses the IMAP (IMAP4rev1, IMAP4, and IMAP2bis) protocol for accessing mail messages on a server.
XCmail - is a MIME and multi POP3 server capable mailtool for X11 using the Xclasses layout library. XCmail was designed completely object orientated and by this may be improved easily.
Exmh - is an X user interface for MH mail. MH provides a set of UNIX commands that manage folders and mail messages. MH has a zillion features as a result of several years of availability.
Thunderbird - is a redesign of the Mozilla mail component. The goal is to produce a cross platform stand alone mail client using the XUL user interface language.
Thunderbird deutsch - deutsches Uebersetzungsprojekt des Mozilla Thunderbird.
Thunderbird + Enigmail Portable for Linux - Here you find the scripts to download and create a portable version of Mozilla Thunderbird + Enigmail and Firefox for Linux.
Portable Thunderbird + Enigmail (Deutsch) - Wenn jemand mehrere Computer nutzt und trotzdem nicht auf Emailverschluesselung verzichten moechte, kann eine portable Version von Thunderbird mit Enigmail verwendet werden. Diese wird auf einem USB-Speicherstick installiert und direkt dort gestartet. Dabei werden saemtliche Benutzereinstellungen und Daten auf dem Stick und nicht auf dem Computer gespeichert.
MrPostman - is a program that allows you to interface different webmail services (like Yahoo! Mail or Hotmail) with a POP mail client.
MUMail - is a Java applet designed to let you read your mail from your home page. So you can read your mail when there is no mail reader available.
fetchtowebmail (fetch T-Online webmail) - laedt E-Mails automatisiert ueber das Webmail-Interface von T-Online herunter und leitet diese dann weiter, um sie mit seinem "normalen" Mailprogramm bearbeiten zu koennen.
Web-Mail-Sucker (WMS) - is an OS independent Perl skript that fetches E-Mail from web-mail accounts and feeds them to the local mail system. It delivers the mail either to a local SMTP server or stores it into the Unix spool file.
AtMail Open - is an open source webmail client written in PHP. The developer aim to provide a elegant Ajax webmail client for existing IMAP mailservers, with less bloat and a focus on an intuitive, simple user interface. The open source version of AtMail provides users with a lightweight, yet powerful webmail client. The software can be installed on a variety of platforms with ease and without the hassles that most webmail platforms impart.
WebMail - is a www-frontend to IMAP/POP3 mailboxes. You can compare it to the systems Hotmail, YahooMail etc use. It allows a user to access his mailbox via the www and do most things other mail programs allow to do.
SqWebMail - is a web CGI client for sending and receiving E-mail using Maildir mailboxes. This is the same webmail server that's included in the Courier mail server, but packaged independently.
IMP Webmail Client - IMP is a set of PHP scripts that implement an IMAP based webmail system. You can use an installation of IMP to check your mail from anywhere that you have web access.
acmemail - is a webmail application written in Perl. It has many features and is quite fast.
readpst - is a utility for converting Microsoft Outlook mail files (personal folders) to standard UNIX mbox format. This is a fork of the libpst project at sourceforge.
Outlook to unix mail converter - This project provides libraries and applications for the conversion of Outlook and Outlook Express data files to Linux MBOX format. The flagship of this project is LibPST which converts Outlook files.
msoutlook2linux - Co-written by ESR and Rob Landley (as a Python script). It converts MS-Outlook 97 address book data to work in either GNOME's GnomeCard contact manager or KDE's abbrowser address book.
Outport - aims to be a generic program for exporting data from Outlook to various email/pim programs. It can export to the Contact, Calendar and Task formats of Evolution, plus a number of generic formats supported by Outlook itself (Rich Text Format, HTML, vCalendar, vCard, iCalendar, etc).
rss2email - is a free tool for delivering news from RSS feeds to your email program that works under Windows and UNIX. So rather than having to learn to use a new program or visit a webpage, rss2email delivers news items to the place where information that is important to you already is.
Mail & News Server - MTAs (Postfix, Exim, Sendmail, Qmail, Courier), POP3- Server, IMAP- Server, Procmail, Fetchmail, Getmail, NNTP Server and more.
Virus Scanners - ClamAV, F-Prot, Antivir, and more. The main purpose of Virus Scanners is the integration with mail servers (attachment scanning).
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Spam Filter  |
SpamAssassin - is a mail filter to identify spam. Using its rule base, it uses a wide range of heuristic tests on mail headers and body text to identify "spam", also known as unsolicited commercial email.
DSPAM - is an anti-spam filter, currently effective as both a server-side agent for UNIX email servers and a developer's library for mail clients, other anti-spam tools, and similar projects requiring drop-in spam filtering
Bogofilter - is a fast Bayesian spam filter along the lines suggested by Paul Graham in his article A Plan For Spam.
spmfilter  - is a high-performance mail filtering framework, written in C. It attempts to be a general filtering framework for any purposes. Filtering mechanisms are provided by plugins, the API enables spmfilter plugins to access messages as they are being processed by the MTA. This allows them to examine and modify message content and meta-information during the SMTP transaction.
CRM114 - is a system to examine incoming e-mail, system log streams, data files or other data streams, and to sort, filter, or alter the incoming files or data streams according to the user's wildest desires. Criteria for categorization of data can be via a host of methods, including regexes, approximate regexes, a Hidden Markov Model, Orthogonal Sparse Bigrams, WINNOW, Correllation, KNN/Hyperspace, or Bit Entropy (or by other means- it's all programmable). CRM114 learns, and it learns fast. CRM114 is compatible with SpamAssassin or other spam-flagging software; it can also be pipelined in front of or behind procmail. CRM114 is also useful as a syslog or firewall log filter, to alert you to important events but ignore the ones that aren't meaningful.
SpamProbe - is a Bayesian spam filter with some advanced features.
SpamBayes - is a Bayesian anti-spam filter. The core code is a message classifier, however there are several end-user applications available as part of the SpamBayes project which use the classifier in specific contexts.
Junkfilter - is a procmail- based filter system for electronic mail. Procmail is a popular and powerful mail- processing program available for nearly all Unix systems. Junkfilter is configurable on a systemwide or per-user basis.
Mailfilter - is a flexible utility for Unix (-like) operating systems to get rid of unwanted spam mails, before having to go through the trouble of downloading them into the local computer. It offers support for one or many POP accounts.
Popsneaker - is intended to be used in conjunction with a mail retrieval tool like fetchmail. The concept is to start popsneaker first to clean your mailaccount and then run fetchmail to download the mails popsneaker considered good.
MuRX - "Mailfilter Using Regular eXpressions" is a mailfilter clone with an more object-orientated design and some extra features mailfilter is lacking of, e.g. AND filter rules.
SpamCruncher - is a GPL'd small perl-Script, that uses spamassassin for identifiying spam on remote POP3 or IMAP- Servers.
Animail - is a POP3/APOP/IMAP4 (with or without SSL) mail retrieval utility. It features an advanced filtering system based on blacklisting, whitelisting, or a combination of both.
KShowmail - is a POP3 mail checker for KDE. It loads mail headers from pop3 servers and you can delete selected mails on servers. KShowmail supports multiple accounts.
SaveMyModem - is an anti-spam, mail-shaper, delete- on- server software thought for users who have a dialup connection and are sick and tired of downloading 1MB a day of spam and Win32-worm-attached messages. Since now it supports only pop3 accounts, and smtp accounts for complaining.
pop3browser - is intended to browse your mail on mail server and to delete unwanted (SPAM) mails before downloading via a low-bandwidth connection. Im LinuxUser erschien im November 2003 ein Howto (in deutsch).
IMAP Spam Begone - (isbg) is a script that makes it easy to scan an IMAP inbox for spam using SpamAssassin and get your spam moved to another folder. Unlike the normal mode of deployments for SpamAssassin, isbg does not need to be involved in mail delivery, and can run on completely different machines to where your mailbox actually is.
MIMEDefang - is a robust e-mail filter designed to protect Windows clients from mail-borne viruses and trojans. It has become the leading Milter worldwide, but MIMEDefang is intended for experienced Linux administrators.
MailStripper - is an SMTP spam filter with anti-virus capability, and is Mail Transfer Agent (MTA) independent. This filter software works with SMTP-based MTAs by filtering the incoming SMTP stream.
Maia Mailguard - is a web-based management system for amavisd-new. Written in Perl and PHP, it gives end-users control over how their mail is processed by virus scanners and spam filters, while giving mail administrators the power to configure site-wide defaults and limits.
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| News / Usenet: |
slrn - ("s-lang read news") is a newsreader that runs in console mode. It is highly customizable, allows free key- bindings and can easily be extended using the sophisticated s-lang macro language.
Gnus - is a flexible message reader running under GNU Emacs. It supports reading and composing both news and mail. In addition, it is able to use a number of web-based sources as inputs for its groups..
Wanderlust - is a mail/news reader for Emacs(en) apparently written from the ground up for IMAP.
Mew - is a user interface for text messages, multimedia messages (MIME), news articles and security functionality including PGP, SSH and SSL. Mew is an acronym for "Messaging in the Emacs World".
tin - is a threaded NNTP and spool based newsreader.
News Clients - is a list of many News Clients.
Free Software Directory - category "Newsreaders".
Linux Online - category "Networking / News".
News Server - NNTP Servers (INN, Leafnode and more).
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| RSS/Atom feed reader: |
Newsbeuter - is an open-source RSS/Atom feed reader for text terminals. It runs on Linux, FreeBSD, Mac OS X and other Unix-like operating systems. Newsbeuter's great configurability and vast number of features make it a perfect choice for people that need a slick and fast feed reader that can be completely controlled via keyboard.
Snownews - is a text mode RSS/RDF newsreader. It supports all versions of RSS natively and supports other formats via plugins.
Canto - is an Atom/RSS feed reader for the console that is meant to be quick, concise, and colorful. It's meant to allow you to crank through feeds like you've never cranked before by providing a minimal, yet information packed interface. No navigating menus. No dense blocks of unreadable white text. An interface with almost infinite customization and extensibility using the excellent Python programming language.
RSSTail - is a console RSS reader that monitors a feed and outputs new entries. This small, simple application reads an RSS feed an outputs it like the 'tail' command.
Liferea (Linux Feed Reader) - is an aggregator for online news feeds for Gtk/Gnome.
Feed2Imap - is an RSS/Atom feed aggregator. After Downloading feeds (over HTTP or HTTPS), it uploads them to a specified folder of an IMAP mail server. The user can then access the feeds using Mutt, Evolution, Mozilla Thunderbird or even a webmail.
The RSSyl plugin - is an RSS feed aggregator for Claws Mail. It has the following features: handling of RSS 1.0, RSS 2.0, and Atom feeds, fetching and threaded display of comment feeds, customisable refresh interval for each feed and customisable number of feed items to keep for each feed.
Evolution RSS Reader Plugin - adds RSS Feeds support for evolution mail. Evolution RSS can display article using summary view or HTML view.
rss2email - is a free tool for delivering news from RSS feeds to your email program that works under Windows and UNIX. So rather than having to learn to use a new program or visit a webpage, rss2email delivers news items to the place where information that is important to you already is.
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| Messaging: SMS, ICQ, Chat, VoIP, Web Phone ... |
SmsSend - allows you to send free SMS to any GSM, connecting to Internet sites using scripts.
GNOME SmsSend - is a user interface to SmsSend.
PerlSMS - is a simple but powerfull front-end to smssend, it will dangerously speed up youre sms messages per minut ;).
Pidgin - is a multi-protocol Instant Messaging client that allows you to use all of your IM accounts at once. Pidgin can work with: AIM, Bonjour, Gadu-Gadu, Google Talk, Groupwise, ICQ, IRC, MSN, MySpaceIM, QQ, SILC, SIMPLE, Sametime, XMPP, Yahoo!, Zephyr. Pidgin is free software. It is licensed under the GNU General Public License (GPL) version 2.
CenterIM - (also known as "cim") is the forked project based on the good old famous CenterICQ instant messaging client by Konstantin "Konst" Klyagin.
Licq - is a multi-threaded ICQ clone. It uses an extensive plugin system to manage many different functions.
Kopete - (The KDE Instant Messenger) is an instant messenger supporting AIM, ICQ, MSN, Yahoo, Jabber, IRC, Gadu-Gadu, Novell GroupWise Messenger, and more. It is designed to be a flexible and extensible multi-protocol system suitable for personal and enterprise use.
KXicq - is the old KDE ICQ client, KXicq2 is written for KDE 2 and KDE 3, but also works with other Window Managers like Gnome, Window Maker (with Docking!) and others.
SIM (Simple Instant Messenger) - is an ultiprotocol plugin-based instant messenger for X11 (optionaly support KDE).
KVIrc - is a free portable Internet Relay Chat client based on the Qt GUI toolkit. KVirc is being written by Szymon Stefanek and the KVIrc Development Team with the contribution of many IRC addicted developers around the world.
XChat - is an IRC chat program for both Linux and Windows. It allows you to join multiple IRC channels (chat rooms) at the same time, talk publicly, private one-on-one conversations etc. Even file transfers are possible.
BitlBee - brings IM (instant messaging) to IRC clients. It's a great solution for people who have an IRC client running all the time and don't want to run an additional MSN/AIM/whatever client. BitlBee currently supports the following IM networks/protocols: XMPP/Jabber (including Google Talk), MSN Messenger, Yahoo! Messenger, AIM and ICQ.
aMSN - is a free open source MSN Messenger clone, with features such as: Display pictures, Custom emoticons, Multi-language support (around 40 languages currently supported), Webcam support, Sign in to more than one account at once, Full-speed File transfers, Group support, Normal, and animated emoticons with sounds, Chat logs, Timestamping, Event alarms, Conferencing support, Tabbed chat windows.
Ekiga - (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many audio and video codecs, and is interoperable with other SIP compliant software and also with Microsoft NetMeeting. To get started: Download Ekiga for your distribution and get a free SIP-Address at ekiga.net.
Linphone - is a web phone: it let you phone to your friends anywhere in the whole world, freely, simply by using the internet. Works with the Gnome Desktop under linux. Nevertheless you can use linphone under KDE.
Skype - is a simple software that will enable you to make free phone calls anywhere in the world in minutes.
Mumble - is an open source, low-latency, high quality voice chat software primarily intended for use while gaming.
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| Webmaster: Webdesign and Tools |
asWedit - is a comprehensive and easy-to-use HTML and text editor for the X Window System and Motif. The program offers three independent modes: a plain text-editing mode and two context-sensitive, validating modes for the authoring of HyperText Markup Language documents.
August - is a free HTML - Editor for Linux and Unix. It's a non-wysiwyg editor - like Aswedit or Hotdog. It's written with the Tcl/TK scripting language and graphical toolkit. It's distributed as a single tcl script, which means that if you know Tcl/Tk you can very easily customize August yourself.
Bluefish - is a GTK HTML editor for the experienced web designer or programmer. Bluefish has extended support for programming dynamic and interactive websites, there is for example a lot of PHP support.
Quanta Plus - is a web development tool for the K Desktop Environment. Quanta is designed for quick web development and is rapidly becoming a mature editor with a number of great features.
Amaya - is a complete web browsing and authoring environment and comes equipped with a "WYSIWYG style" of interface, similar to that of the most popular commercial browsers.
Nvu - is a web editing environment based on Mozilla and its Gecko layout engine. Its cross- platform architecture makes it available on a wide variety of platforms.
KompoZer - is a complete web authoring system that combines web file management and easy-to-use WYSIWYG web page editing. KompoZer is designed to be extremely easy to use, making it ideal for non-technical computer users who want to create an attractive, professional-looking web site without needing to know HTML or web coding.
erwin - is a really really simple html editor. Features: preview rendered html page, support for html tags, intelligent tag closer, drag'n'drop support, source highlighting.
oXygen - is a Java-based XML editor with support for XML, XSL, TXT, XSD and DTD documents. oXygen is a commercial product with two different license types.
Web C Plus Plus - is a command line utility that takes your source code, and converts it into an HTML file using a fully customizable syntax highlighting engine and colour schemes.
(X)HTML-Format - ist ein leistungsstarker quelltext- orientierter HTML- Editor, der zu 100% in Java programmiert wurde und somit betriebssystemuebergreifend einsetzbar ist.
Checkbot - is a tool to verify links on a set of HTML pages. It can check a single document, or a set of documents on one or more servers. Checkbot creates a report which summarizes all links which caused some kind of warning or error.
LinkScan - is an industrial-strength link checking and website management tool. LinkScan is available and professionally supported on all Linux, Unix and Microsoft Windows platforms.
Linklint - is an Open Source Perl program that checks links on web sites. It is licensed under the Gnu General Public License.
HTML TIDY - is a free utility for fixing HTML mistakes automatically and tidy up sloppy editing into nicely layed out markup.
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| File Sharing Tools |
BitTorrent - is a protocol for distributing files. It is peer- to- peer in nature, as users connect to each other directly to send and receive portions of the file.
libTorrent and rTorrent - LibTorrent is a BitTorrent library written in C++ for *nix, with a focus on high performance and good code. The library differentiates itself from other implementations by transfering directly from file pages to the network stack. On high-bandwidth connections it is able to seed at 3 times the speed of the official client. The client uses ncurses and is ideal for use with screen or dtach. It supports saving of sessions and allows the user to add and remove torrents. .
BitTornado - is the next generation bittorrent client built on the original BitTorrent. This client features an enhanced console/curses mode, lots of new features under the hood, and is generally one of the most advanced clients out there. Get this if you need to limit your bandwidth, or you want more control of your torrents. It does everything the original bittorrent does, plus more. The package only contains the curses interfaces, install the package bittornado-gui to get the GUI components.
aria2 - is a lightweight multi-protocol & multi-source, cross platform download utility operated in command-line. It supports HTTP/HTTPS, FTP, BitTorrent and Metalink. aria2 has built-in XML-RPC interface. You can manipulate aria2 via XML-RPC interface. aria2 runs on Linux, FreeBSD, Mac OS X and Windows.
Overnet & eDonkey - Overnet uses a completely decentralized peer to peer network. eDonkey2000 uses the same download system as Overnet but relies on central servers to search for files.
mldonkey - Formerly, mldonkey was a Linux client for the eDonkey network, built from a reverse-engineered version of the protocol. Now, it is also able to connect to multiple networks (gnutella, Direct-Connect, Soulseek, etc).
Jungle Monkey - is a distributed file sharing program. JM is for Unix and requires GTK/GLIB 1.2, GNet 1.1, and some other libraries. Gnome support for Gnome 1.0 and 1.2 is available and using it is strongly recommended.
pDonkey - is the set of tools for manipulating eDonkey peer2peer protocol. The main goal of the project is to provide basic API for the protocol and to create open source server for eDonkey network.
Lmule - is a Linux port of eMule client which is based on the eDonkey2000 network, but offers more features than the standard eDonkey client.
xMule - s an easy to use synchronizing fork of the popular eMule client. Based upon the wxWidgets library and GNU C++, xMule currently supports GNU/Linux, and *BSD.
jMoule - is a frontend for mlDonkey. It is coded in Java (the "j" in the soft title) and is inspired by well known clients like eDonkey and eMule.
aMule - is short for "another eMule file- sharing program". It is another fork of the xMule project.
dcMule / binaryDC - is an emule and eFarm based system providing efficient file distribution and community chat.
LimeWire - is a software tool that enables peer-to-peer file sharing on the Gnutella Network.
File Sharing Server.
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| Server and Admin-Tools |
Leafnode - is a USENET software package designed for small sites running any flavour of Unix, with a few tens of readers and only a slow link to the net.
sn NNTP Server - is a small news system for small sites serving perhaps a few dozen newsgroups, and with a slow connection to the internet.
InterNetNews package (INN) - is a complete Usenet system. It includes innd, an NNTP server, and nnrpd, a newsreading server.
Diablo - is a comprehensive newsfeeding and newsreading software package that was originally developed by Matthew Dillon and now run as an open source project..
News Servers - offers a list of many News Servers, NNTP Caching Servers and News Server Utilities (including the links to their websites).
Newsserver - ist eine Auflistung vorhandener Newsserver- Software mit einigen Hinweisen aus Sicht eines interessierten Laien.
Exim - is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Postfix - is a fast, easy to administer, and secure MTA that started life as an alternative to the widely-used Sendmail program.
Virtual Exim - is a PHP and MySQL based approach to hosting multiple email domain using Exim. It provides you with a nice interface to maintain your users and domains.
exiscan - is an email content scanner patch for the exim MTA. The exiscan-acl patch adds content scanning to the exim4 ACL system.
Sendmail - This web site is maintained by the Sendmail Consortium to be a resource for the freeware version of sendmail.
qmail - is a secure, reliable, efficient, simple message transfer agent. It is designed for typical Internet- connected UNIX hosts.
Procmail - can be used to create mail-servers, mailing lists, sort your incoming mail into separate folders, start any programs upon mail arrival, or selectively forward certain incoming mail automatically to someone.
Spam Filter - here are some programs to avoid user's E-mail box to be flooded by unsolicited commercial email (=Spam) which is flourishing on the Internet.
amavisd-new - is a high-performance interface between mailer (MTA) and content checkers: virus scanners, and/or SpamAssassin.
Virus Scanners - ClamAV, F-Prot, Antivir, and more. The main purpose of Virus Scanners is the integration with mail servers (attachment scanning).
fetchmail - is a full-featured, robust, well-documented remote-mail retrieval and forwarding utility intended to be used over on-demand TCP/IP links.
getmail - is a POP3 mail retriever. getmail is designed to be secure, flexible, reliable, and easy-to-use. It is intended as a replacement for fetchmail.
Courier Mail Server - The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework. Individual components can be enabled or disabled at will.
Cyrus IMAP Server - is generally intended to be run on sealed systems, where normal users are not permitted to log in. The mailbox database is stored in parts of the filesystem that are private to Cyrus. All user access to mail is through the IMAP, POP3, or KPOP protocols. The private mailbox database design gives the server large advantages in efficiency, scalability, and administratability.
Binc IMAP - is a well designed, modular IMAP server for Maildir. Its goals are to be secure, stable, and fast, yet flexible and easy to maintain.
Dovecot - Secure IMAP server - is an IMAP and POP3 server for Linux/UNIX-like systems, written with security primarily in mind.
Popa3d - is a tiny POP3 daemon, designed with security as the primary goal. It's written from scratch by Solar Designer for OWL (Openwall Gnu/*/Linux). Popa3d can work both in standalone or inetd mode.
Teapop - is an RFC1939 and RFC2449 compliant POP3- Server, which is quickly gaining world- wide recognition. With its' flexible virtual domain support, Teapop distinguishes itself from other POP3-servers.
Qpopper - is a server that supports the POP3 protocol for downloading Internet e-mail from software clients. Qpopper now includes TLS/SSL.
GNU Mailutils - is a collection of mail-related utilities. Specifically, this package contains a POP3 server, an IMAP4 server, and a Sieve mail filter.
SquirrelMail - is a standards-based webmail package written in PHP4. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in pure HTML 4.0 (with no JavaScript required) for maximum compatibility across browsers.
IMP Webmail Client - Horde / IMP is a set of PHP scripts that implement an IMAP based webmail system. You can use an installation of IMP to check your mail from anywhere that you have web access.
Squid - is a high-performance proxy caching server for web clients, supporting FTP, gopher, and HTTP data objects. Unlike traditional caching software, Squid handles all requests in a single, non-blocking, I/O-driven process.
Privoxy - is a web proxy with advanced filtering capabilities for protecting privacy, filtering web page content, managing cookies, controlling access, and removing ads, banners, pop-ups and other obnoxious junk.
SquidGuard - is a free (GPL), flexible and ultra fast filter, redirector and access controller plugin for squid. It lets you define multiple access rules with different restrictions for different user groups on a squid cache. squidGuard uses squid's standard redirector interface.
SquidGuard Configuration Webmin Module - This module helps you to configure the SquidGuard filter via Web Interface. It supports all configuration sections and statements of SquidGuard .
DansGuardian - is an Open Source web content filter. It filters the actual content of pages based on many methods including phrase matching, PICS filtering and URL filtering.
DansGuardian Anti-Virus Plugin - is a GPL addon that takes Virus Scanning capabilities and integrates them into the content filtering web proxy DansGuardian.
Viralator - is a Perl script that virus scans http downloads request on a UNIX server after passing through the Squid proxy server.
Frox - is a transparent ftp proxy, that optionally supports caching (either through an external http cache or by maintaining a cache locally), and/or running a virus scanner on downloaded files. It is written with security in mind.
wwwoffle - is a simple proxy server with special features for use with dial-up internet links. This means that it is possible to browse web pages and read them without having to remain connected.
Apache - is a powerful, flexible, highly configurable and freely-available HTTP (Web) server. The goal is to provide a secure, efficient and extensible server that provides HTTP services in sync with the current HTTP standards.
Cherokee - is a very fast, flexible and easy to configure Web Server. It supports the widespread technologies nowadays: FastCGI, SCGI, PHP, CGI, SSI, TLS and SSL encrypted connections, Virtual hosts, Authentication, on the fly encoding, Load Balancing, Apache compatible log files, Data Base Balancing, Reverse HTTP Proxy, Traffic Shaper, Video Streaming and much more. A user friendly interface called cherokee-admin is provided for a no-hassle configuration of the server.
DHTTPD - (stand for Dublet's HyperTextTranferProtocol Deamon) is a fast and secure webserver. Started as a toy, growing up to be an apache killer. Making life easier for admins. Fully featured. Fully secure. Fully blazing.
fnord - "yet another small httpd". fnord is a small and fast webserver with CGI-capability. fnord has been written by Felix von Leitner. fnord supports virtual hosting und runs under tcpserver.
thttpd - "tiny/turbo/throttling HTTP server". thttpd is a small, simple, portable, fast, and secure HTTP server.
Boa Webserver - is a single-tasking HTTP server. That means that unlike traditional web servers, it does not fork for each incoming connection, nor does it fork many copies of itself to handle multiple connections. The primary design goals of Boa are speed and security.
Xitami - is a small, fast, and powerful multiplatform Open Source web server.
Tornado - is an open source version of the scalable, non-blocking web server and tools that power FriendFeed. The FriendFeed application is written using a web framework that looks a bit like web.py or Google's webapp, but with additional tools and optimizations to take advantage of the underlying non-blocking infrastructure. The framework is distinct from most mainstream web server frameworks (and certainly most Python frameworks) because it is non-blocking and reasonably fast. Because it is non-blocking and uses epoll, it can handle thousands of simultaneous standing connections, which means it is ideal for real-time web services.
Midgard - is an Open Source content management system based on Apache and MySQL. The system uses PHP as its scripting language.
ZOPE - is software you run on a server to publish dynamic web sites. It consists of a web and ftp server, a middle layer which coordinates getting things into and out of the database, and an object database.
SAMBA - is a file and print server for Windows - based clients using TCP/IP as the underlying transport protocol.
Linux NFS - This document and the included links are for anyone who needs to become more familiar with NFS.
XtreemFS - is a distributed and replicated file system for the Internet. XtreemFS allows you to mount and access your files via the internet from anywhere. With XtreemFS you can easily replicate your files across data-centers to reduce network consumption, latency and increase data availability. XtreemFS implements striping of files over several storage servers for increased I/O bandwidth and capacity. This is similar to RAID0. Paralell I/O ensures that read/write operations are executed in parallel on the storage servers to exploit the full bandwidth.
djbdns - is a DNS package by DJ Bernstein that consists of dnscache (a caching DNS resolver), tinydns (a DNS server), pickdns (a load-balancing DNS server), walldns (a reverse DNS wall), axfrdns (an implementation of an area transfer server), a few DNS clients and troubleshooting tools. djbdns separates the resolver and the server, which provides enhanced security and flexibility.
BIND - (Berkeley Internet Name Domain) is an implementation of the Domain Name System (DNS) protocols and provides an openly redistributable reference implementation of the major components of the Domain Name System, including: a Domain Name System server (named), a Domain Name System resolver library, tools for verifying the proper operation of the DNS server.
Unbound - is a validating, recursive, and caching DNS resolver. Unbound is designed as a set of modular components, so that also DNSSEC (secure DNS) validation and stub-resolvers (that do not run as a server, but are linked into an application) are easily possible. The source code is under a BSD License.
MaraDNS - is a package that implements the Domain Name Service. MaraDNS is intended for environments where a DNS server must be secure and where the server must use the absolute minimum number of resources possible. The code uses a special string library which is resistant to buffer overflows. The code, if started as root, mandates running as an unprivledged user in a chroot() jail.
Dnsmasq - is designed to provide DNS and, optionally, DHCP, to a small network. Dnsmasq is targeted at home networks using NAT and connected to the internet via a modem, cable-modem or ADSL connection but would be a good choice for any small network where low resource use and ease of configuration are important.
PowerDNS - is a modern, advanced and high performance authoritative-only nameserver. It is written from scratch and conforms to all relevant DNS standards documents. The PowerDNS Nameserver utilizes, a flexible backend architecture can access DNS information from any data source. This includes file formats, Bind zone files, relational databases or LDAP directories.
pdns - does not aim to be a complete name server such as BIND. It is optimized for caching, and you can only specify a small subset of all dns record types pdnsd knows in your local "zone" definitions. This of course reduces the code size drastically, and such the memory footprint. There are some features especially interesting for dialin networks and computers that are often not connected to to their network.
Time Synchronization Server - The Network Time Protocol (NTP) is used to synchronize the time of a computer client or server to another server or reference time source, such as a radio or satellite receiver or modem.
Timesynchro - gleicht die interne Uhr eines Linux-Servers bzw. einer Workstation kontinuierlich mit Zeitservern im Internet ab. Es ist moeglich, dass alle im Netzwerk befindlichen PCs sich mit dieser Zeit abgleichen.
OpenVPN - is an easy-to-use, robust, and highly configurable SSL VPN (Virtual Private Network) daemon which can be used to securely link two or more private networks using an encrypted tunnel over the internet.
Openswan - is an Open Source implementation of IPsec for Linux. It is a code fork of the FreeS/WAN project, started by a few of the developers who were growing frustrated with the politics surrounding the FreeS/WAN project.
VNC - stands for "Virtual Network Computing". It is a remote display system for a wide variety of machine architectures.
TightVNC - is an enhanced version of VNC, which includes a lot of new features, improvements, optimizations and bugfixes over the original VNC version.
NX Free Edition for Linux - is an enterprise-class solution for secure remote access, desktop virtualization, and hosted desktop deployment built around the self-designed and self-developed NX suite of components. Thanks to its outstanding compression, session resilience and resource management and its integration with the powerful audio, printing and resource sharing capabilities of the Unix world, NX makes it possible to run any graphical application on any operating system across any network connection. The NX Free Edition allows 2 concurrent users to connect no matter what their location is, and share the desktop. NX Free Edition is incredibly easy to install and run, leverages the competence and quality of the company that makes NX and, most importantly, is free forever.
TeamViewer - TeamViewer as Linux version available: With TeamViewer you can remotely control any PC anywhere on the Internet. No installation is required, just run the application on both sides and connect - even through tight firewalls. TeamViewer is free for all non-commercial users!
PuTTY - is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an xterm terminal emulator.
OpenSSH for Windows - is a free package that installs a minimal OpenSSH server and client utilities in the Cygwin package without needing the full Cygwin installation.
LUFS - is enabling you to mount into your file hierarchy a remote computer's file system, which is accessible by various means (ftp, ssh, etc.). Then, the access to the remote files will be completely network transparent.
shfs/sshfs - The "(Secure) SHell FileSystem Linux kernel module" is a simple and easy to use Linux kernel (2.4) module which allows you to mount remote filesystems using plain shell (ssh/rsh) connection.
vsftpd - is a GPL licensed FTP server for UNIX systems, including Linux. It is secure and extremely fast. It is stable.
Pure-FTPd - is a free (GPL), secure, production-quality and standard-conformant FTP server based upon Troll-FTPd.
twoftpd - is a new FTP server that strives to be secure, simple, and efficient. None of the commands can cause execution of other programs, and the normal model of execution does a chroot to the logged in user's directory immediately after authentication.
OpenNap - Open Source Napster Server is a server for connecting the clients together. With Napster, the files stay on the client machine, never passing through the server. The server provides the ability to search for particular files and initiate a direct transfer between the clients.
Nagios - is a commercial host and service monitor designed to inform you of network problems before your clients, end-users or managers do. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.).
Icinga - is an enterprise grade open source monitoring system which keeps watch over a network and any conceivable network resource, notifies the user of errors and recoveries, and generates performance data for reporting. Scalable and extensible, Icinga can monitor complex, large environments across dispersed locations.
VisualRoute - is a visual, fast, and integrated ping, whois, and traceroute program that automatically analyzes connectivity problems, displaying the results on a World map. When configured as a Server, VisualRoute provides visual trace route services to clients.
Network Probe - This free network monitor and protocol analyzer gives you an instant picture of the traffic situation on your network and enables you to monitor network traffic in real time, hunt down, identify, and isolate traffic problems and congestions on your network.
EtherApe - is a graphical network monitor for Unix modeled after etherman. Featuring link layer, ip and TCP modes, it displays network activity graphically. It supports Ethernet, FDDI, Token Ring, ISDN, PPP and SLIP devices.
Webmin - is a web-based interface for system administration for Unix. Using any browser that supports tables and forms (and Java for the File Manager module), you can setup user accounts, Apache, DNS, file sharing and so on.
Linuxconf - is a sophisticated administration system. It lets you manage Boot and boot services, Date & time, DNS, Email (sendmail), File systems and file services, Firewalls, Network connectivity, User accounts, UUCP.
Dynamic DNS Clients for UNIX/Linux - this clients simplifies the process of updating the IP in a Dynamic DNS system (see DynDNS for Details).
Security Tools - Firewall, PGP/GnuPG, Anti-Virus, etc.
Database Server and Tools.
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