I have and still use many types of CAD applications for both Mac and Windows. I use CAD apps. for landscape design and the importing of pre-modern ship drawings into CAD and redrawing the lines to scale so I can built the boat from scratch.
GIMP is a freely distributed program for such tasks as photo retouching, image composition and image authoring. It can be used as a simple paint program, an expert quality photo retouching program, an online batch proces ...
