Blender is a phantastic open source 3D graphics program
Going 3D with Blender: Modeling a clock
Going 3D with Blender: Modeling a chest
Going 3D with Blender: A room with toys
Going 3D with Blender: A toy train
Going 3D with Blender: Very first steps
The Gimp is a wonderful 2D graphics program
Photo magic with Gimp
Playing around with Dingbats and The Gimp
Creating panoramic views using Hugin, Enblend and The Gimp
Image Magick can achieve amazing things in a short time when used together with the shell.
The article is already a bit old and ImageMagick has changed a bit but the basics are still the same.
Do magic with images on the shell
Tuxpaint is a paint program (not only) for kids which is absolutely great and fun!
Tuxpaint: A paint program for kids
Kino is a very good program for editing film.
Light, camera, action..Kino!
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