Heartbeat - Listen to music with your friends together, on Spotify
Owlead - Grow your Twitter with valuable followers, effortless
JQBX - turntable.fm for spotify
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.
Parallel - Listen to music with friends over Spotify at the same time
DeskAlerts - Send alerts to any corporate device: PCs, phones, tablets, etc.