Spine - Spine is 2D animation software designed specifically for software and game development.
Pivot Animator - Pivot Stickfigure Animator is a unique software, that allows you to create stick figure animations...
Synfig Studio - Just another WordPress site
Stick Nodes - Stick Nodes is an app that allows you to easily create your own stickfigure-based animations
Unity 2D - Unity 2D is a powerful and feature-rich game design solution built from the ground up to fulfill every basic and advanced need of the developer.
StickyPy - Stick figure animation program written in Python and PyGame