Sock Puppets App for iOS
'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.'
This is a free app