iOS SDK library which allows the user to draw on screen and save as an image? [closed]

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Are there any iOS libraries which give a custom control where users can draw on the screen, and it can be exported as an image file?

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Below are some Open Source Projects I've found on Github.

• Painter
• Paint-App
• Cloud Finger Paint Client

In terms of Libraries or Frameworks, here is one from CocoaControls (which by the way has a whole collection of Cocoa stuff for OSX and iPhone)

• Smooth Line View

You could incorporate the GLPaint code that Apple provides or use some of the code in the QuartzDemo Demo Application. You could create a simple application just using the touch methods and UIBezierPaths on a view.