The Blender Foundation is constantly testing and improving the free open source 3D modeling and animation software Blender, and part of that process is to get the funding to allow a talented team of people to do some actual animations with it. This one is called Sintel, it was made back in 2010 and has a lot of heart. Hit their site to download the free open source Blender and start creating your own animations and 3D objects today.