Equalizer APO
A system-wide equalizer for Windows 7 / 8 / 8.1 / 10
https://equalizerapo.sourceforge.io/

HeSuVi
Headphone Surround Virtualizations for Equalizer APO
https://hesuvi.sourceforge.io/
https://a.fsdn.com/con/app/proj/hesuvi/screenshots/HeSuVi%20Window.png

? Dolby Atmos Headphone
? CMSS-3D
? SBX Pro Studio Surround (also found in BlasterX Acoustic Engine & THX TruStudio Pro)
? Dolby Headphone
? Sennheiser GSX Binaural 7.1
? DTS Headphone:X
? Windows Sonic Headphone
? Dolby Home Theater v4 Headphone Surround Virtualizer
? Razer Surround
? Out Of Your Head
? Flux HEar V3
? OpenAL HRTF
? and many more!