A list of miscellaneous web tools, guides and tips:

HTML Playground, html, css reference by example
Nice and Free CSS Templates
CSS Cheat Sheet
Devlisting - Web developer resources
Font Tester - CSS Font Comparison Tool
Veerle's Topp, Daily Color Scheme - Your every-day color resource, we bring you daily-fresh colorschemes
Resources For Web Design
Layout Cookbook - An Illustrated Reference of Web and Graphic Design Layouts
15 Sites That Will Inspire You To Become A Better Web Designer
Freelance Designer’s Toolbox: 200+ Resources for Freelance Web Designers
CSS-Tricks Downloads
Webmaster Guidelines - Webmasters/Site owners Help
Comprehensive guide to .htaccess- intro
21 ways to streamline your CSS | A Padded Cell