e_Chat
Perl based web chat script. Site contains feature list, demonstration, details of add-ons and a forum.
JabberChat
Free CGI based chat script. Site contains latest news, online demonstration, download area, FAQ and message board.
KeepTalking
Microsoft Windows based chat server. Site contains description of the product, whats new, technical information, pricing and downloads.
Ralf's Chat
Perl based and free for non commercial use. Site includes an online demonstration, downloads, news, source code and a forum.