GCN (Global Communications Network)

With e-mail, chat rooms, private messages, games, a web browser, a pop-up-blocker, profiles, message boards, desktop sharing, integration with AIM, MSN, Yahoo, and ICQ, voice-chat rooms, video conferencing, language translation, file transferring, whiteboards, a media player, support for multiple languages, integrated encryption, free Web hosting, and Internet access, GCN has absolutely everything you could need in a chat program. The best part is, GCN is and always will be absolutely free.

Version 2.9.1 adds a Preferences menu, a tabbed conversation window, support for multiple languages, and improves Firewall/Router support.