Unity - The multiplatform game creation tools for everyone.
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!
Godot Engine - Feature-packed 2D and 3D open source game engine.
GoAnimate - Make your own animation quickly and economically with GoAnimate. Reach prospects and customers with animated videos online about your business and products.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Renderforest - Free animation and intro maker, slideshow and video creator