Diptic 2.0

Note: This is an iOS app, you can find the Mac app here:Diptic for Mac
Diptic helps you easily combine multiple photos and apply artistic effects to create exceptional photo collages that can be shared with friends and family via email, Facebook, Twitter, Flickr, Tumblr or Posterous. With rounded borders, 52 customizable layouts and color effects, there are unlimited options to create unique images!