Hey! Check out The Ultimate Jigsaw Puzzle Center! It is available on the Appstore for FREE!!!

Really easy to use, a lot of free jigsaw puzzles, you can use your own photo library, it has multiplayer features and it is very well designed. A must have Jigsaw Puzzle app. Organizing jigsaw puzzle competitions with your friends and family is also really exciting.
iTunes link: The Ultimate Jigsaw Puzzle Center for iPad on the iTunes App Store

Further description can be found at: sites.google.com/site/jigsawpuzzlecenter

Enjoy the game