git-source-metrics is a script that can measure things (like lines of code, lint error count, commit rate, the number of active developers or anything else that can be expressed as a shell command that prints a single integer or float value).
git-source-metrics will make measurements for each commit (or once every N days) throughout the git history and produce time series plots that shows how the metrics changed. It also offers some basic analysis features like selecting a range and seeing how much each series changed both in absolute numbers and as a percentage during that period.
GPLv3