Keybase Chat - End-to-end encrypted chat built into Keybase
Mixed in Key - Mixed In Key is award-winning DJ software that gives you the #1 technique of the world's best...
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
Tunebat - A browser based song key and bpm database. Supplies compatible songs for harmonic mixing.
Pandora - Pandora Radio is a free (ad-supported) internet radio founded in 2000.
KeyFinder - Key estimation software for DJs