Matchering - Open-source audio mastering app that masters music based on any reference track you provide.
Lurssen Mastering Console - Digital audio mastering powered by years of pro-quality mastering experience.
eMastered - eMastered makes a song sound better through online mastering.
Fabfilter Pro C - High-quality compressor plug-in for the most demanding engineers
Studio One - Studio One raises the bar for music production software. Developed by PreSonus, this platform has been used by both professional and amateur artists to make live and studio recordings.
mix:analog - a sound studio from the cloud that you control