Buck Buck Bunny is the result of the Peach Open Movie Project. This Blender Film was first released in 2008.

Peach Targets
This Open movie project had as main targets:
Developing tools in Blender for editing and rendering hair, fur or grass
Improve character animation tools for cartoonish motion and deformation
Test Blender with giant outdoor environments, with large grassy fields and many trees with leaves
Further validate Blender as a professional animation creation suite
And secondary:

Create a great and good looking animation short, licensed freely as open content
Provide content for other artists to learn from or to re-use, including documentation and tutorials
And of course: Have lots of fun!

Big Buck Bunny
Copyright (C) 2008 Blender Foundation | peach.blender.org
Some Rights Reserved. Creative Commons Attribution 3.0 license.
http://www.bigbuckbunny.org/