Check out the latest Demo Reel for the Free Open Source Software Blender. For anyone that is looking for a low budget software to create high end quality animations and compositing then I highly recommend they take a look at Blender.org.
It is free to download and use and there tons of free tutorials all throughout the web. Some of my favorite tutorials can be found at blenderguru.com and CGCookie. Now go grab your free copy and make some movies! 🙂