KeyFinder - Key estimation software for DJs
MusicBrainz Picard - Official website for MusicBrainz Picard, a cross-platform music tagger written in Python.Downloads · MusicBrainz Blog · Picard 2.
Mixed in Key - Mixed In Key is award-winning DJ software that gives you the #1 technique of the world's best...
TagScanner - TagScanner is a multifunction program for organizing and managing your music collection.
Tunebat - A browser based song key and bpm database. Supplies compatible songs for harmonic mixing.
Kid3 - If you want to easily tag multiple MP3, Ogg/Vorbis, FLAC, MPC, MP4/AAC, MP2, Opus, Speex, TrueAudio, WavPack, WMA, WAV and AIFF files (e.