Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
Doodly - Create your own doodle video in just 60 seconds
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Animaker - Animaker is an online do-it-yourself (#DIY) animation video maker that brings studio quality presentations within everyone's reach. Animated Videos, Done Right!
Sculptris - Sculptris: Enter a world of digital art without barriers.
Prezi - Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.