Equalizer APO - A system-wide equalizer for Windows 7 / 8 / 8.1 / 10 with channel remapping/copying capabilities
Fat Lama - Borrow stuff you need. Lend stuff you don't
FxSound - Clearer Sound for Your PC. The new FxSound boosts your sound quality, volume, clarity and bass.
Ruckify - peer-to-peer marketplace for rentals
Boom 2 - Boom is a simple volume booster that lets you boost the volume of your Mac and your music files.
Daylui.com - Daylui is an "Airbnb for everyhing else".