Version Control
The following applications related to version/revision control are written in Python:
Version Control Systems
Abstraction Layers and Tools
Tools with unified interface to several version control systems.
Hg-Git - access Git repositories from Mercurial
pysync - abstraction layer, looks inactive, but a lot of commits
pyvcs (Alex Gaynor and co.) - pure python abstraction layer of multiple VCS, very lightweight
vcs - another abstraction layer, seems to be MIT licensed
Migration Tools
cvs2svn - the CVS to Subversion repository converter
Tailor - a tool to migrate changesets between ArX, Bazaar, Bazaar-NG, CVS, Codeville, Darcs, Git, Mercurial, Monotone, Subversion and Tla repositories
Repository Browsers
Trac supports repository browsing
ViewVC (formerly ViewCVS) - a repository browser for CVS and Subversion
The lists below should be arranged in ascending alphabetical order (excluding "Version Control Systems" which should be stated first). When specifying release dates please use the format YYYY-MM-DD.