Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
Nuraphone - Headphones that sense and adapt to your unique hearing
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
Parrot Bepop Drone - Drone + Tablet + Oculus Rift --> magical combination
Boom 2 - Boom is a simple volume booster that lets you boost the volume of your Mac and your music files.
Apple - Available on iOS