From Smith Micro Software:
Sock Puppets lets you create your own lip-synched videos and share them on Facebook and YouTube. Add Puppets, props, scenery, and backgrounds and start creating. Hit the record button and the puppets automatically lip-synch to your voice. Friends can work together with multiple puppets and create hilarious conversations. While recording, simply tap a puppet and that puppet will lip-synch, tap a different puppet and switch auto lip-synching to it. Switch backgrounds to take your puppets to different places, move the puppets, props and scenery to animate them while recording. Cartoon and photo realistic puppets are included.