Discussions offers a robust set of functions for building communities.
Communispace is a new environment designed to support communities of practice and knowledge management. The developers claim that it works best with small groups of around 20 people. It contains chats, bulletin boards, decision support, voting and an information database. There are many interesting community features including user profiling. What WWWThreads tries to provide is a real community atmosphere and extensive customization options by the admin and the end user with the extra advantage of using a SQL backend.