Matchering - Open-source audio mastering app that masters music based on any reference track you provide.
Hone - Helping men fix low testosterone, hormone health, and more
eMastered - eMastered makes a song sound better through online mastering.
iZotope Ozone - Master audio with Ozone 9, the industry’s most comprehensive mastering software. Use intelligent DSP, spectral shaping, Tonal Balance Control, Low End Focus, Master Rebalance, and more.
Audio Mastering - Pro quality, fully functional audio mastering application for iPad.
Complexer - Cross-platform, multi-stage dynamics processor.