VisualSVN - VisualSVN - Subversion plugin for Visual Studio
TortoiseSVN - The coolest interface to (Sub)version control
Xversion - Super easy enterprise class version control.
SnailSVN - Similar to Tortoise SVN for Windows but integrated into Finder
RabbitVCS - RabbitVCS is a set of graphical tools written to provide simple and straightforward access to the...
kdeSVN - Comfortable graphical SVN client for linux.