Animation Paper - Animation Paper is a software package for doing 2D animation.
Captain Chords - Write chord progressions in your favorite DAW
Synfig Studio - Just another WordPress site
RapidComposer - MusicDevelopments RapidComposer: Music Prototyping and Automated Composition Software
CrazyTalk Animator - CrazyTalk Animator, the next level of 2D animation. Create actors using any photo or illustration.
Cthulhu - VST MIDI-FX plugin for harmonic inspiration