Internet

• Gyach
  Gyach is a GTK+-based Yahoo! Chat client which can use your existing Yahoo! logins for chatting in Yahoo! Chat. It supports colors, emotes/aliases, PMs, set status, remote user status display, ignore...
  
• Acidblood
  Acidblood is an open source IRC robot written for Unix. Its features include channel and user management. ...
  
• Jeti
  Jeti is an instant messenger based on the Jabber protocol, it is programmed in Java so it can run on every computer with at least java 1.4. ...
  
• Echat
  eChat is a serverless messaging system dedicated to real-time chat and messages exchange over the TCP/IP networks ...
  
• GLANChat
  GLanChat is linux version popular chat program LANChat Pro. Program has friendly interface written in Gtk+2.0 ...
  
• Forum
  Simple PHP-based forum. ...
  
• Gajim
  Gajim is a Jabber client based on a plugin system. ...
  
• Kpopup
  KPopup is a program, for sending and receiving Microsoft(tm) WinPopup messages. It's programmed under the GNU GPL2. ...
  
• AndyChat
  AndyChat is a multi-protocol console chat program written in Perl which uses Curses. Its goal is to provide a common console interface to all major room-based (IRC) and instant messenger based (ICQ, ...
  
• phpFreeChat
  php Free chat is a free, simple to install, fast and customizable chat server that uses a simple filesystem for message and nickname storage. It uses AJAX to smoothly refresh and display the chat zon...
  
• ParaIrc
  ParaIrc - a simple Java IRC-Client ...
  
• mcabber
  mcabber is a small Jabber console client for Linux ...
  
• vICQ
  vICQ is simple ICQ client written in Perl with the look and feel of micq. Its features include sending messages, receiving messages, invisible handling, receiving contacts and contact requests, recei...
  
• QBabbel
  QBabbel is a very simple Qt-based VoIP application. ...
  
• netwalker-ircc
  netwalker-ircc is an IRC client which uses the ncurses library to print the screen. ...
  
• Gaim-vv
  Gaim-vv is a fork of the Gaim instant messaging client that concentrates on video and voice support. ...
  
• openc6
  OpenC6 is a free C6 instant messaging client and implements the c6 protocol ...
  
• Comicq
  COMICQ is a command line ICQ messaging tool that allows a user to connect to ICQ using your UIN and password, then sends a message to the destination UIN. ...
  
• Mantaray Console
  Mantaray Console is a terminal client which provides replacement of p2p IM program Mantaray. ...
  
• ircd
  ircd is the original Internet Relay Chat Daemon which is still actively maintained. It is used by IRCnet, one of the biggest IRC Networks. ...
  
• Gaimosd
  Gaim OSD is an implementation of the XOSD library, allowing Gaim to display several notification messages. ...
  
• LinPoPup-2
  LinPopUp-2 is a GTK+2 port of well known LinPopUp program. ...
  
• Hole
  Multi-user chat system with a ton of features. ...
  
• IRC to MSN gateway
  irc2msn is a daemon that emulates an IRC server. It connects to Microsoft Messenger and rewrites all PRIVMSGS to equivalent Messenger messages: your IRC client is the MSN GUI. You can send/receive me...
  
• psyBNC
  psyBNC is an irc bouncer which holds the connection to the irc-server. ...