Open source / Free (libre) movies

Here are a few outstanding open source movies:

Blender

A must watch:
http://orange.blender.org/ Elephants Dream is the world’s first open movie, made entirely with open source graphics software such as Blender, and with all production files freely available to use however you please, under a Creative Commons license.
The short film was created by the Orange Open Movie Project studio in Amsterdam during 2005/2006, bringing together a diverse team of artists and developers from all over the world.

http://peach.blender.org/ Big Buck Bunny is the second Open Source movie by the blender community, and is currently in production. Check also their Open Game project: http://apricot.blender.org/.

The forum for all ongoing Blender Open Projects is here: http://www.blender.org/forum/viewforum.php?f=20