Glowing Tabs Menu
If you're looking to implement glowing, hover menu's - this is pretty easy to do:
http://www.dynamicdrive.com/style/csslibrary/item/glowing-tabs-menu/
Plus, you could always customize and spiff it up a little.
Learning CSS – The Basics
Hate is a strong word. But I do hate badly designed websites. Fact.
It surprises me that people still don't make any effort to write style-sheets for their websites and merge the content and presentation layers all in the HTML code.
This is good start (all on one page, ready to print):
http://www.cssbasics.com/printfull.html
Photoshop/Illustrator Brushes
We've all been to a site that's using these - now you can do them yourself.
It's got lots of brushes of 'foliage' and other vector graphics that you're bound to find useful if you use Photoshop or Illustrator.
Forgot to mention that it's (mostly) free. At least, at the moment.
Loading GIFs
If you ever wanted a quick loading GIF (on a white or black background) - especially for an AJAX site, this might just be the place you're looking for.
Background maker
Using this online-tool, you can make tiled-backgrounds and see the result in real-time.
The drawing tools could be better, but still, extremely valuable to any web-designer.