jQuery Tabbed Interface / Tabbed Structure Menu Tutorial - A really nice tutorial on how to implement a space saving interface to improve the usability of any website / blog. Demo here!
20+ Cheat Sheets Handy For Designers – Photoshop, Illustrator and many more covered here with detailed views on the Brush and Pen tools.
30 Awesome Design Enhancing jQuery Plugins – An excellent post with a link to a demo for every single one!
10 Best jQuery Plugins – March 2009 – Some new jquery plugins!
Discover the “Cool” of CSS: 25 Advanced CSS Techniques – If you want to make a javascript free site, some of these examples may be of use.
200 Free Exclusive Icons: Siena - You can never have enough icons to choose from! Just subscribe to their RSS feed to get the download link!