FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
Olive Video Editor - Olive is a free non-linear video editor for Windows, macOS, and Linux.
Boom 3D - Audio enhancer with 3D surround sound
DaVinci Resolve - Revolutionary new tools for editing, color correction and professional audio post production, all in a single application!
Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
Kdenlive - Free and open-source, full-featured video editor.