EarTrumpet - Volume Control for Windows
Boom 3D - Audio enhancer with 3D surround sound
Volume2 - Volume2 is an advanced Windows audio mixer, a complete replacement for the standard Volume Control.
Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
KMix - KMix is an application to allow you to change the volume of your sound card.
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.