- PowToon: http://www.powtoon.com/ (Free account required, online)
- Garry's Mod: www.garrysmod.com (Paid, Windows/Mac, $9.99)
- Wideo: http://wideo.co/ (Free account required, online)
- Moovly: http://www.moovly.com/ (Free account required, online)
- Creaza: http://www.creazaeducation.com/this-is-creaza/Cartoonist (Free account required, online)
- Prezi: http://prezi.com/ (Free account required, online)
- ToonDoo: http://www.toondoo.com/ (Free account required, online)
- GoAnimate.com: http://goanimate.com/videomaker (Paid/free trial, online)
Let me know if links are not working so I can update them.