A very nice custom stylesheet (use with User CSS in Safari), specifically for Pinboard. Makes it a lot more attractive, but just as usable.

A straightforward guide to using floats in CSS. This has always confused me, but I think I finally understand it now after reading this.

An easy guide to styling Disqus comments using a custom CSS stylesheet.

This looks like an interesting project. I confess that I've always had trouble wrestling with floats.

Looks like an interesting project. I'm all for these kinds of framework kits to make designing web pages easier for those of us who are artistically-challenged.

This is incredibly cool: generate sparkline graphs using only jQuery and CSS. I need an excuse to use this somewhere.

Good reference for CSS

"Spiffy Corners is a simple way to generate the CSS and HTML you need to create anti-aliased corners without using images or JavaScript."

Web Developer's Handbook is a pocket-edition of the Web-Dev-Bookmarks (alvit.de/web-dev) - a list of essential web-sites, which make the life of web developers easier.

3 column flexible CSS layout

Good resource for designing pages for mobiles etc.

This looks like a nifty way to get started with a WordPress design if you're new to CSS.