SoundMate - Enjoy SoundCloud from your Mac's menu bar
beaTunes - Smart software for library management, music analysis, and playlist creation. For Windows and macOS.
Tangerine - A beautiful full-screen SoundCloud player
KeyFinder - Key estimation software for DJs
NOISESUPPLY - Pandora for SoundCloud
foo_bpm - A component for calculating the BPMs (beats per minute) of any tracks in Foobar2000.