TortoiseSVN - The coolest interface to (Sub)version control
SnailSVN - Similar to Tortoise SVN for Windows but integrated into Finder
RapidSVN - CollabNet, Facilitating Collaborative Software Development
Xversion - Super easy enterprise class version control.
Cornerstone 4 by Assembla - The ultimate Subversion client for Mac
RabbitVCS - RabbitVCS is a set of graphical tools written to provide simple and straightforward access to the...