Found some more tutorials showing how to use the free open source image editing software GIMP. One is called Gimpguru.org and includes for example textual tutorials like how to remove red eyes in photos. The website is maintained by Eric R. Jeschke and though the last news post is from May 16 2006 and the front page is last modified May 17 2006 the tutorials seems adequate.
The other GIMP tutorials are interactive screen casting videos (think it’s produced with Camtasia) and in Swedish. The tutorials are produced by Håkan Källqvist, an art teacher and working for The National Resource Centre for Educational Media (swe. Multimediabyrån) at The Swedish National Agency for School Improvement (swe. Myndigheten för Skolutveckling). Thanks, Håkan!
GIMP is a free image editing software like Adobe Photoshop, but they call GIMP an image manipulation program. GIMP works for a lot of operating systems like Mac, Windows and Linux but also FreeBSD and Solaris. I found some video tutorials for GIMP of different quality of course.
One is: “How To Make A Userbar In GIMP” It’s uploaded on Google Video.
You have some quicktime video tutorials on Gimp “Creating a Graduated ND-filter“, “Creating water drops“, “Full flare control” and “LAB color boost“. All video tutorials published at the blog SVDV-Photography.
You also have some video tutorials on GIMP at Designyourownweb.com. Totally 11 tutorials about all from installing GIMP to using Bezier tool, selection tools, transform tool, zoom, move, crop, layers etc.
There are more video tutorials out there. You can point out the more qualitative ones here by doing a blog comment.