Whyteboard is a painting application which allows the annotation of PDF, PostScript documents and various image formats with common drawing tools (pen, rectangles, ellipses, text). A history of your drawing will be stored, facilitating the replaying of your drawing. Whyteboard enables tabbed painting, with a thumbnail, which update when drawings are created, allowing the editing of multiple documents or images inside one instance of Whyteboard.
Requires wxPython - ImageMagick can optionally be installed if you want to load PDF/PS files
Manual: http://code.google.com/p/whyteboard/wiki/UsingWhyteboard
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