A graphical, easy to use backgammon game. You can play against the computer or across the network. There is also a general server that allows an arbitrary number of connections. Works on Linux and Windows. Also a Breton translation.
Bonita is a flexible cooperative workflow system based on the workflow model proposed by the ECOO Team, which incorporates the anticipation of activities as a more flexible mechanism of workflow execution.
jMoney@Home is a small financial software package that lets you manage your household. It uses MySQL for its data, supports networking, and has multiuser support.
Linuxsms is a cool script in Perl for send short messages to gsm phones.
Of course you need plugin for each mobil operater. I don't know, what is
the situation in CR.
WeirdX is an X Window System server in pure Java under GNU GPL. It is derived from WiredX-Lite and will run on any platforms which support Java 1.1 and Swing 1.1.