Monstero is a new line of smartphone and tablet cases from Indonesian design Monez Gusmang. The one on the left in the photo above is called ‘The Kuin’. It’s notable because it was designed entirely on an iPad, using ‘finger only’ and no stylus.
Quite a nice result I’d say.
The cases are available for the iPhone and a few other leading smartphones (including Samsung Galaxy and Galaxy Note devices) and also for some iPad models. The price for the smartphone version is around $21.
You can see more detail on these at Gusmang’s website.