openfire : Openfire (formerly wildfire) real time collaboration (RTC) server ( http://www.igniterealtime.org/projects/openfire/ )
prosody : Prosody is a flexible communications server for Jabber/XMPP written in Lua. ( http://prosody.im/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a cvut
For Paludis use this rsync : rsync://gentoo.zugaina.org/cvut-portage
If you have a problem : ycarus(-at-)zugaina.org