Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Matchering - Open-source audio mastering app that masters music based on any reference track you provide.
FreeCAD - An open-source parametric 3D modeler
eMastered - eMastered makes a song sound better through online mastering.
Sculptris - Sculptris: Enter a world of digital art without barriers.
Audio Mastering - Pro quality, fully functional audio mastering application for iPad.