"Meta-CVS is a version control system built around CVS. Although it retains most of the features of CVS, including all of the networking support, it is more capable than CVS, and easier to use."
The features listed on Meta-CVS's web site include: directory structure versioning, improved file type handling, simpler and more user-friendly branching and merging, support for symbolic links, property lists attached to versioned data, improved third-party data importing, and easy upgrading from stock CVS.