Boom 3D - Audio enhancer with 3D surround sound
Noizio - Feeling that the noise of the big city is too much for you to bear?
Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
A Soft Murmur - Ambient sounds to wash away distraction.
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
MyNoise - Custom shaped online noise machines. Many Many generic sounds