GitHub star history and stats - based on JavaScript only, no server side!
Try it now: https://seladb.github.io/StarTrack-js/
For loading the page with repos use the following URL format:
https://seladb.github.io/StarTrack-js/?u=[user1]&r=[repo1]&u=[user2]&r=[repo2]...
For example: https://seladb.github.io/StarTrack-js/?u=seladb&r=pcapplusplus&u=seladb&r=StarTrack-js