Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
Equalizer Pie - Equalizer Pie is a free audio manipulation application for OS X.
Boom 3D - Audio enhancer with 3D surround sound
Hesuvi - Hesuvi imitates the binaural sound effect of many surround virtualizations by making use of...
Spatial Sound Card - Upgrade your Headphones to 5.1 surround sound for free. Includes Volume BOOST!