Wow.

Elephants Dream is a short movie that was created using only free software.  Even the models and textures produced for the movie have been made available.  It is being called the first open-source movie.

I had no idea that animation of this quality was possible with open-source tools.

There is even a full HD (1920×1080) MPEG4 version available if you happen to have the processing power required to decode it in real time.