Granted, it is not totally a copy of Adobe Photoshop, but the interface comes close.
And, when you have never worked with Adobe and can't afford it, this programme helps you get to know it very well. PNG, JPEG, GIF, TIFF are not a problem - but PSD files can not be opened as a layer file.
But you can work with all the layers we are used to in Adobe, and do lots of tricks with brushes filters etc.
So now, everybody can create nice stuffs for the competitions. Found on a German website and in a Belgian Computer Magazine.
Download here:
http://www.artweaver.de/index.php?id=68,151,0,0,1,0 there are online versions and you can download it to your computer as well.