Resources: A Link Library

Cascading Style Sheets

One True Layout
Alex Robinson of Position is Everything walks through a flexible, multi-column, source-ordered layout
Stu Nicholls' CSS PLaY
Cutting-edge CSS... that actually works cross-browser. Some stunningly executed work here, and solutions to any problem you can think of

Design, Graphics, Photography

Behr ColorSmart
Fantastic Flash colour coordination tool; designed for decorating rooms, but works just as well for websites!
Free Stock Photos for Web Designers
An enormous list of sites providing free stock photo images that you can use in design work
Kuler
Adobe's awesome Flash-powered colour scheme tool

Javascript, the DOM, Ajax

How to Develop Web Applications with Ajax
An easy introduction to Ajax from Web Reference
Javascript Effect Libraries
A round-up of Web 2.0 effects libraries (animation, Ajax) by Jonathan Snook
JSON For The Masses
Dustin Diaz's excellent primer on using object notation to structure your Javascript
moo.fx Javascript effects library
Built on prototype.js, this lightweight library includes most of the behaviours you're likely to need
Sorting items with drag'n'drop
Tim Taylor's handy examples of the many ways drag-and-drop sortable lists can be implemented

Server-Side Scripting, PHP, ASP

Write more efficient PHP
Evolt.org pull together a series of useful tips for PHP beginners (although old hands may learn something new as well)

Server Stuff

Block comment spamming domains
Half-a-meg of .htaccess denial rules, preventing the worst offenders from ever reaching your site

Typography

20 Best License-free fonts
Vitaly Friedman's list of his personal pick of free-to-use typefaces around the web
Free fonts from Robot Johnny
A great selection of whimsical fonts, available for free for personal projects
Free fonts in a portrait
A collection of free fonts

Usability, Interface Design

23 Tips from McAfee on User Interface Design
McAfee share their top tips on how better UI design reduced support calls by 90%
Label Placement in Forms - an Eyetracking study
Excellent article from UX Matters on the relative benefits of different form/label layouts
The Elements of Style for Designers
Applying Strunk & White's little book for writers to the practice of web design
Yahoo! Design Pattern Library
Y! have opened up their design patterns collection, with detailed descriptions and rationale behind common design decisions