The Motosoto Community Portal Server (CoPS). CoPS supports virtual communities through discussions, chat, news, broadcast, library, search, yellow pages, profiles, etc. CoPS runs on Linux using Apache, JBoss, JServ, Jabber and XMl/XSL.
COG is an easy to use and maintain system for creating webcommunities where users can interact with each other. Highly customizable and easy to develop for and use.