80Four
Includes over 20 free tutorials for Adobe Photoshop and for web related topics.

GraphX Design: General Graphics Tutorials
A few tutorials on general web graphics issues. Although there aren't many tutorials yet, the tutorial on colors is very detailed and well worth reading in order to better understand color issues for web graphics. Other topics covered are dithering and anti-aliasing.

Lori's Web Graphics
An excellent resource for finding information on creating images with Paint Shop Pro 5. Includes tutorials on creating buttons, text images, backgrounds, and more. Also includes general information on animation, optimization, filters, effects, and even image maps.

Optimizing Animated Gifs: Webreference
An excellent tutorial on the optimization of animated gifs for a web site. See how to make the file size as small as possible using the tips in the tutorial.