9 Common Usability Mistakes In Web Design

(from DZone.com)

14 Most Useful Web Design Cheat Sheets

• Photoshop


• CSS


• XHTML


• JavaScript Frameworks


• Flash

(from DZone.com)

Easy WebServices in Java (not the common way)

(from DZone.com)

Web-design tutorials

• 50 Excellent AJAX Tutorials;
  
• 66 Links To Learn The Webdesign Basics;
  
• Top 126 Ajax Tutorials.
  

(from DZone: 1, 2, 3)

7 Free CSS Editors, Which Is the Best? You Choose

(from DZone.com)

Designing rich AJAX Web interfaces with ZK

Producing visually pleasant documents from plain text with reStructuredText and rst2a

Quickstart Flex development with this maven archetype

250+ Tools and Resources For Coding the Web

(from Linux.com)

(The Only) Ten Things To Know About CSS

What CSS is and how to use it at its best.

(from dzone.com)

10 High-Profit Redesign Priorities

He's one of the fathers of usability, so Jakob Nielsen's advices on web-design are always precious...

This article presents 10 suggestions on how to improve a for-profit website; anyway, many of them can be very useful for general purpose sites too.

Contains a link to an even more interesting set of articles about Writing for the Web.

(From dzone.com)

EDIT: corrected Gollum-style "precioussssss" ;-)