Principle - Principle makes it easy to create animated and interactive user interface designs.
Synfig Studio - Just another WordPress site
IxEdit - IxEdit is a JavaScript-based interaction design tool for the web.
OpenToonz - OpenToonz is an animation program that is a free software version of Toonz, the animation software...
TinyMCE - TinyMCE is a content editor that functions as a plug-in for Wordpress websites.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.