Matchering - Open-source audio mastering app that masters music based on any reference track you provide.
Fabfilter Pro C - High-quality compressor plug-in for the most demanding engineers
Lurssen Mastering Console - Digital audio mastering powered by years of pro-quality mastering experience.
Maximus - Image-Line's advanced compressor, limiter and maximizer plugin.
Audio Mastering - Pro quality, fully functional audio mastering application for iPad.
Multicomp Plus MK2 - Versatile audio compression plugin featuring 5 models: VCA, OPTO, FET, Console4K and VCA160