CVS

CVS is an acronym for Concurrent Versions System, and is the time-honored multi-platform version control system used just about anyplace you care to name (at least until Subversion takes over).

• Branching and Merging Reference
• CVS Scripting
• Using CVS with Project Builder

• CVL
• CVSspam - CVS to insanely colorful HTML mail.
• CVStrac - my personal favorite, used on the CVS Section of this site. There's also a pre-built binary for Mac OS X.
• CvsGraph
• ViewCVS
• StatCVS
• TortoiseCVS - for Windows