FishEye

FishEye is an application that lets you search, track, and visualize code changes. With this tool, you can visualize and report on your activity and search for commits, files, revisions, or teammates across SVN, Git, Mercurial, CVS, and Perforce.

You can get a graphical representation of activity in your source, report on lines of code over time, and get a visual audit trail of changes.