Hesuvi - Hesuvi imitates the binaural sound effect of many surround virtualizations by making use of...
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
Letasoft Sound Booster - Boosts sound volume above maximum level
Boom 3D - Audio enhancer with 3D surround sound
Razer Surround - Razer Surround audio software features 7.
Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities