Subversion is a source code management system (scms) designed from ground up to replace CVS as the best option for open source SCM. It's not in production state yet, but it's steadily running towards stability and feature completeness.
The homepage for the subversion project is located at http://subversion.tigris.org
-- MarcusBrito - 17 Dec 2002
A SubversionClient that integrates SubVersion with Idea is available at the IntelliJPluginsHome page. It only works with version 3 of IDEA, 'tho, so don't waste your time if you're using anything newer.
The homepage for the development of the SubversionClient is located at
http://svnup.tigris.org
-- HansMarggraff - 22 Dec 2003