VideoLan - VLC: Official site - Free multimedia solutions for all OS!
Spine - Spine is 2D animation software designed specifically for software and game development.
Renderforest Video - Free animation and intro maker, slideshow and video creator
Synfig Studio - Just another WordPress site
BombBomb - BombBomb allows companies to easily record and send video email from Gmail, mobile, or web.
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.