Matchering - Open-source audio mastering app that masters music based on any reference track you provide.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Audio Mastering - Pro quality, fully functional audio mastering application for iPad.
Invision - Prototyping and collaboration for design teams
eMastered - eMastered makes a song sound better through online mastering.
Sketch - Professional digital design for Mac.