Bonsai

Bonsai is tree control.

It is a tool that lets you perform queries on the contents of a CVS archive; you can: get a list of checkins, see what checkins have been made by a given person, or on a given CVS branch, or in a particular time period. It also includes tools for looking at checkin logs (and comments); doing diffs between various versions of a file; and finding out which person is responsible for changing a particular line of code ("cvsblame").