| bitlbee | Brings instant messaging (XMPP, MSN, Yahoo!, AIM, ICQ, Twitter) to IRC | |
| centerim | Fork of CenterICQ - A text mode menu- and window-driven IM interface | |
| choqok | A Twitter/identi.ca/laconica client for KDE | |
| ejabberd | Jabber server written in Erlang | |
| ejabberd-mod_archive-svn | ejabberd message archive module | |
| ejabberd-mod_mysql-svn | mysql support module for ejabberd | |
| ejabberd-mod_pgsql-svn | postgresql support module for ejabberd | |
| ekg | A text-mode Gadu-Gadu client | |
| ekg2 | ncurses based Jabber, Gadu-Gadu, Tlen and IRC client | |
| emesene | A pygtk MSN Messenger client | |
| empathy | A GNOME instant messaging client using the Telepathy framework. | |
| gajim | A full featured and easy to use Jabber client | |
| kadu | A Qt-based Jabber/XMPP and Gadu-Gadu client | |
| kde-telepathy-meta | KDE-Telepathy meta package | |
| kmess | A MSN Messenger client for Linux | |
| licq | Advanced graphical ICQ clone and more for Unix | |
| mcabber | a small Jabber console client, includes features: SSL, PGP, MUC, UTF8 | |
| minbif | An IRC gateway to IM networks that uses libpurple. | |
| pidgin | Multi-protocol instant messaging client | |
| pork | Console-based AOL Instant Messenger & IRC client | |
| prosody | Lightweight and extensible Jabber/XMPP server written in Lua. | |
| psimedia | Voice and video chat plugin for Psi-like IM clients. The implementation is based on GStreamer. | |
| skype | P2P software for high-quality voice communication | |
| telepathy-logger | Telepathy framework logging daemon | |
| telepathy-mission-control | A Telepathy component providing abstraction of some of the details of connection managers. | |
| tkabber | Tkabber is an open source Jabber client, written in Tcl/Tk. |