GIMP

InspIRCd is a modular C++ IRCd (IRC daemon) for Linux, BSD, Windows and Apple OS X systems created to provide a stable, modern, and lightweight IRCd written from scratch.

Private Tracker Pro tracks the user`s current location and logs the locations that the user has visited into a hidden log file. Best of all, Private Tracker Pro runs in a discrete manner, and the users are not aware that they are tracked.

Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.

Xfire is the instant messenger for gamers. See when your friends are playing online games.

OnLAN Messenger - Enterprise product - messaging service is a client-server multi-user application for instant messaging and file exchange (instant messenger).