Mixed in Key - Mixed In Key is award-winning DJ software that gives you the #1 technique of the world's best...
VisiPics - VisiPics does more than just look for identical files, it goes beyond checksums to look for similar...
Tunebat - A browser based song key and bpm database. Supplies compatible songs for harmonic mixing.
dupeGuru - dupeGuru is a tool for finding duplicate files on your computer.
KeyFinder - Key estimation software for DJs
Pixiple - Find images similar in pixel and/or metadata content