Rithm - Chat with music
Vinylly - Dating app based entirely on music compatibility
Systemize - Create new habits and achieve more goals in life
Mixerbox - Access iTunes, YouTube, Spotify,Radio etc within one app.
Sonos - Play music from Spotify straight to Sonos
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.