TortoiseSVN - The coolest interface to (Sub)version control
iDeals Virtual Data Room - iDeals Virtual Data Room is a tool that provides secure access to large amount of confidential documents and can view, analyze and collaborate in a protected environment.
VisualSVN - VisualSVN - Subversion plugin for Visual Studio
Digify - Secure yet simple to use, Digify is the easiest way to track and protect confidential and...
SnailSVN - Similar to Tortoise SVN for Windows but integrated into Finder
ShareVault - ShareVault provides Virtual Data Rooms for secure document sharing during due diligence and other business critical processes.