RapidSVN is a cross-platform GUI front-end for the Subversion revision system
written in C++ using the wxWindows framework. This project also includes a
Subversion client C++ API.
Features
* Simple - provides an easy to use interface for Subversion features
* Efficient - simple for beginners but flexible enough to increase
productivity for experienced Subversion users
* Portable - runs on any platform in Subversion and wxWindows can run: Linux,
Windows, Mac OS 9/X, Solaris, etc.
* Fast - entirely written in C++
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http://rapidsvn.tigris.org/