If you are a web designer, I am sure you will like it, 53 CSS-Techniques You Couldn’t Live Without, from a wonderful site, smashing magazine. The webmaster of the site did great effort to collect those things, I really appreciate that! Here I just list some of it, and take it into my bookmark. You can go there to get the full list.
4. CSS Bar Graphs (CSS For Bar Graphs)
14. CSS Diagrams
22. CSS Map Pop
Is there some relationship with WebGIS? Yes, list 22, 45 and 50 can be used for thematic map. I will use some similar script in SUAS MapServeri. More than CSS, this site brought us many other Scripts and articles about CSS, AJAX and Xhtml.
Here are 3 useful links:
You can find more, Thanks for their nice and arduous collecting!!