Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
SoundNode - SoundCloud desktop app (OS X, Windows, Linux)
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
Cumulus - A SoundCloud player that lives in your menubar.
Boom 2 - Boom is a simple volume booster that lets you boost the volume of your Mac and your music files.
Sleeve - Your currently playing track displayed right on your desktop