SoundNode - SoundCloud desktop app (OS X, Windows, Linux)
Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
Cumulus - A SoundCloud player that lives in your menubar.
Boom 3D - Audio enhancer with 3D surround sound
Sleeve - Your currently playing track displayed right on your desktop
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.