If you're a hardcore player of the Street Fighter series and you're prepping up for the next PS4/PC iteration, up-to-date frame data and hitboxes are one of the things you'll certainly want to know.
Dantarion, a programmer known for his reverse-engineering contributions in the Street Fighter scene, offers a an extensive variety of tools on his site. His Boxdox utility in particular is sure to become an essencial tool. Check it out if you're thinking of taking part in the competitive scene.
http://watissf.dantarion.com/
Reflex Tester
