Umbraco XSLT and XPATH Visualizer and Resources

I just stumbled across a new site that would have been very useful in getting up to speed with XSLT and XPATH not only when getting started with Umbraco, but also with Sitecore.  It's Pimp My XSLT by Chriztian Steinmeier (@greystate).

My favorite fun tool on the site is an XPath Axes Visualizer:

Basically, you can change the current page by clicking the tree, then see what pages would be returned by using the various axes on the bottom-right.  Fun fun!

Of course, the real meat of the site is in the articles.  Check it out!

Other XSLT Resources:

• w3schools.com XSLT Tutorial
• w3schools.com XPATH Tutorial
• XPATH Axes and their Shortcuts
• XSLT and XPATH Quick Reference

Any other XSLT resources you find yourself going back to time and time again?