Synfig Studio - Just another WordPress site
CrazyTalk Animator - CrazyTalk Animator, the next level of 2D animation. Create actors using any photo or illustration.
Animation Paper - Animation Paper is a software package for doing 2D animation.
Spine - Spine is 2D animation software designed specifically for software and game development.
Melody Generator - Randomly generated MIDI melodies you can use for free
CelAction 2D - CelAction 2D is the name of a powerful and highly advanced 2D animation program for the perfect creation of 2D animation.