[Free download until Sunday 24th]
You take a photo, then touch area on the photo where you want to pop up.
Then you will get animated image file. Here is a sample from a blog Kaishiden,
You may also set the generated image as a Twitter icon.
The app is priced at $1.99, but until 24th Sunday it will be available for free by a release campaign.
via Kaishiden blog [J]