Algunos enlaces que recopila este interesante artículo:

1. Gradient Overlay
2. CSS Dropdown Menu
3. Simple CSS External Links
4. Sexy CSS Buttons
5. CSS Style Switcher
6. Custom CSS Forms
7. Visual Sitemap
8. Quick CSS Tables (with code!)
9. Sorting Tables
10. Quick Web 2.0 Buttons

Ver el listado completo en: http://www.designvitality.com/

ACTUALIZACION

Otros excelentes recursos y herramientas para CSS (especialmente Wordpress)… Gracias Dilbert por el dato!

• Em Calculator estimates Em size equivalent to px size.
• Clean CSS — yet another CSS cleaner/optimizer.
• CSS Tweak — another CSS optimizer from cssdev.com
• westciv’s complete CSS guide
• MODI — Another amazing bookmarklet from Slayer Office. MODI is a mouse-over DOM inspector.
• W3C CSS Validator
• I Like Your Color via Red Alt — Type in the URL and it grabs the interface colors and display them in hex. Freakin’ Awsome!
• XHTML Semantic Generator — The XHTML Semantic Generator is a system designed to help developers prototype and test URL’s to ensure they contain basic accessibility and usability features present in modern web technologies, and to automatically implement them if possible.
• Special Characters List via manicalrage.net
• Online CSS Optimizer
• 4096 Color Wheel
• ColorCombos — Yet another online color pallet tool.
• COLORlovers — nice collection of user-picked colors & palettes with hex code.
• Weelstyled.com’s color scheme generator
• CSS Hacks Browser Support Chart

Ver listado completo en: http://kraudio.wordpress.com/ o http://www.soxiam.com/