Community Server is the award winning platform for rapidly enabling online communities and includes all the integrated tools, such as discussion forums, email lists, newsgroups, weblogs (blogs), file galleries, content management, and more to help enable you to create your community presence quickly and easily!
The free Express Edition is perfect for people that need to get a community up-and-running on a budget. It is free, but has restrictions on use but can be used commercially.
Download: Community Server 2008 Free Express Edition
