As mentioned Muvizu is one of a kind within this field as it offered actual 3D scenes, characters, and props. You can also import your own 3D elements into a scene. Motion tracking is easy, 3D camera operation, lip-syncing, and many more features. You don't have to be an animator to build your first scene in minutes.
Plotagon - This app, Plotagon. is very fun. Creative and lets me express my ideas and all of my desiors!
Doodly - Create your own doodle video in just 60 seconds
MocapX - Facial Motion capture app Maya and iPhone. With the MocapX animator, you can easily use the iPhone camera to animate characters in real time directly in Maya. MocapX tools enable you to use any custom or production rig as well as any Maya feature.
Animaker - Animaker is an online do-it-yourself (#DIY) animation video maker that brings studio quality presentations within everyone's reach. Animated Videos, Done Right!
CrazyTalk Animator - CrazyTalk Animator, the next level of 2D animation. Create actors using any photo or illustration.
Prezi - Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.