| amsn | | Alvaro\'s MSN messenger client |
| anope | | Set of Services for IRC networks |
| atheme | | Flexible IRC services system with proven scalability |
| bitchbot | | Bitchbot is a perl-based IRC bot |
| bitchx | | IRC client based on ircII |
| bitlbee | | IRC to other chat networks gateway |
| blackened | | The Blackened IRC client |
| bnc | | Simple IRC relay proxy with support for virtual hosting |
| bsflite | | Lightweight AIM client for the command line |
| centerim | | Instant Messenger interface supporting many protocols |
| cgiirc | | Access IRC from a web browser |
| climm | | Text-mode ICQ client |
| ctrlproxy | | Detachable internet relay chat proxy server |
| dccserver | | Standalone replacement for the mIRC /dccserver command |
| dircproxy | | Detachable internet relay chat proxy server (devel version) |
| eggdrop | | IRC robot with TCL scripting and multi-channel ability |
| ejabberd | | Free and Open Source distributed fault-tolerant Jabber server |
| ekg | | Experimental Gadu-Gadu Client (Polish instant messaging system) |
| emacs-jabber | | Jabber client for Emacs |
| emech | | IRC bot written in C |
| empathy | | Gnome instant messenger client |
| epic4 | | The (E)nhanced (P)rogrammable (I)RC-II (C)lient |
| epic4-doc | | Additional documentation for epic4 package |
| farsight2 (V) | | Audio/video communications framework |
| finch | | Multi-protocol Instant Messaging client console frontend |
| fisg | | Fast IRC statistics generator |
| gajim | | Jabber client written in PyGTK |
| gale | | Secure instant messaging system |
| gg2 | | Instant messenger software for Poland; Jabber plugin included |
| gloox | | Jabber/XMPP client library |
| gnomeicu | | GNOME ICQ client |
| goofey | | Text-based client for goofey, a flexible short message system |
| gossip | | GTK2 Jabber Instant Messaging client |
| gtmess | | Console-based MSN Messenger client |
| i2cb | | Next generation Internet Citicen's Band chat client |
| i2cbd | | Next generation Internet Citizens Band chat server |
| icb | | Internet CB - a mostly-defunct chat client |
| icbirc | | Proxy IRC client and ICB server |
| icqlib | | Implementation of the icq protocol |
| iip | | The Invisible IRC Project |
| inspircd | | Modular C++ IRC Daemon |
| inspircd12 | | Modular C++ IRC Daemon |
| ircII | | 'Internet Relay Chat' and 'Internet Citizens Band' Client |
| ircd-hybrid | | IRC server with many options |
| irchat-pj | | Emacs lisp interface to Internet Relay Chat |
| ircservices | | Services for IRC networks |
| ircu | | Internet Relay Chat server customized for Undernet |
| iroffer | | IRC (Internet Relay Chat) DCC OfferBot |
| irssi | | Secure and modular IRC client with text mode user interface |
| irssi-icb | | Irssi plugin to access ICB networks |
| irssi-xmpp | | Irssi plugin to connect to the Jabber network |
| jabberd | | Instant messaging server |
| jabberd2 | | XMPP (Jabber) instant messaging server |
| kadu | | Chat client for Gadu-Gadu network (Poland) |
| kmess | | MSN Messenger Client for KDE3 |
| konversation | | KDE IRC Client |
| konversation-kde3 | | KDE IRC Client |
| libfolks | | Library to manage contacts |
| libirc | | C library for the IRC protocol |
| libmsn | | Library for connecting to Microsoft's MSN Messenger service |
| libotr | | Library for Off-The-Record encrypted messaging |
| libpurple | | Multi-protocol Instant Messaging client backend |
| libtelepathy | | Unified framework for many different kinds of real-time communications |
| libtlen | | Library to access tlen.pl IM system |
| licq-core | | ICQ client with plugin support |
| licq-gui-console | | Curses GUI for licq |
| licq-gui-qt | | Qt GUI for licq |
| loudmouth | | Lightweight Jabber client library |
| meanwhile | | Lotus SameTime compatible chat protocol |
| microblog-purple (V) | | Libpurple plug-in supporting microblog services like Twitter |
| msn-pecan | | Alternate MSN protocol plugin for libpurple |
| msnre | | Console-based MSN Instant Messenger clone |
| mu-conference | | Implementation of the XEP-0045 Multi-User Chat protocol |
| naim | | Ncurses-based AIM, ICQ, IRC, and Lily client |
| navi2ch | | 2ch BBS browser for Emacs |
| ninja | | Another IRC client based on ircII |
| p5-IRC-Utils | | Common utilities for IRC-related tasks |
| p5-Net-AIM | | Implementation of the AOL Instant Messenger TOC protocol |
| p5-Net-AOLIM | | Perl5 module for connecting to AOL IM (TOC protocol) |
| p5-Net-Goofey | | Perl module for communicating with a Goofey server |
| p5-Net-ICQ2000 | | Perl5 modules for the ICQv7 protocol realisation |
| p5-Net-Jabber | | Provide a Perl Developer access to the Jabber protocol |
| p5-Net-XMPP (V) | | Provide a Perl Developer access to the XMPP protocol |
| p5-POE-Component-IRC | | Fully event-driven IRC client module |
| p5-POE-Filter-IRCD | | POE-based parser for the IRC protocol |
| pfnet (V) | | Minimal FNET-like ICB client written in Perl |
| pidgin | | Multi-protocol Instant Messaging client GTK frontend |
| pidgin-facebookchat | | Plugin for pidgin to support Facebook IM |
| pidgin-festival (V) | | Pidgin plugin that interfaces with festival |
| pidgin-icb | | ICB protocol plugin for the Pidgin instant messenger |
| pidgin-latex | | Plugin for pidgin to render LaTeX as images |
| pidgin-libnotify | | Pidgin plugin that adds popup support |
| pidgin-otr | | Plugin for pidgin to add OTR (Off-The-Record) encryption |
| pidgin-sametime | | Lotus Sametime plugin for the Pidgin instant messenger |
| pidgin-silc | | SILC plugin for the Pidgin instant messenger |
| pidgin-status-to-twitter (V) | | Update Twitter with your Pidgin status |
| pidgin-twitterstatus (V) | | Use your Twitter account as your Pidgin status message |
| pircbot | | Java IRC Bot Framework |
| prosody | | Flexible communications server for Jabber/XMPP written in Lua |
| prpltwtr (V) | | Treat microblogging (Twitter, etc) as IM protocols |