If you're looking for great free, open source, multi-platform (Windows, Linux, Mac OS) image editing software, then look no further: you need the GIMP (which stands for GNU Image Manipulation Program) ...

maybe this is the best forum for the following.... I've just tried GIMP for the first time - interesting program, but I couldn't see any *very* desirable features (given I have access to photoshop 6).

A programming language based on Scheme that is included in the GIMP image editing program. See GIMP and Scheme. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

Here's what I'd like to do: take a directory full of grayscale images, switch them to RGB in the Gimp, add a layer of a certain color, change the layer to screen instead of normal, flatten the image, ...