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, ...
The free and open source photo-editing program called GIMP (GNU Image Manipulation Program) is a nice alternative to the subscription-based or boxed versions of its competition (including PhotoShop).
The latest issue of Linux Journal includes an article explaining how you can remove "red-eye" from flash photographs. Martin Guldahl, author of the Channel Mixer plugin, recently sent me a script that ...