Animation

I just recently viewed this delightful series of animations on Voicethread:

Some resources for animation in the classroom:

Amazing Animation Lessons on the Web
Be Very Afraid: Animation for Education
iStopMotion2
I Can Animate
Pencil
Blender (Open Source 3D Animation)

The Animator from Alon Perry on Vimeo.

What are some other tools available to do animation?
Who is doing animation in Maine classrooms?
What can be learned from doing animations?