Web site devoted to typography, type, fonts and typefaces. Lots of articles and helpful tools on this one. Features real-world examples of beautiful type, font spotlights, tutorials, and The Font Game (see how big a typography nerd you are!)
The Typetester is an online application for comparison of fonts for the screen. It's like csstypeset only this allows comparison of more than one typestyle at once! :)
Helpful to see web-safe fonts at a glance, also good for knowing which fonts are considered websafe for which systems.
By Steven D. While many designers have been quick to embrace web standards, it's surprising how often the basic standards of typography are neglected.
This one has been around for a while! :) Lots of free javascript/ajax scripts.
"Hot Scripts is the net's largest PHP, CGI, Perl, JavaScript and ASP script collection and resource web portal."
Lots of free (and some commercial) scripts of all kinds, especially PHP, but also has ajax, Flash, and a few Ruby on Rails.
W3C's easy-to-use
HTML validation service, based on an SGML parser.
A great classic site that's been around since DHTML was ajax and the web didn't have a version number. Now it's become a great repository of tutorials and scripts for ajax and CSS.
Source-Ordered content code generator (PIEfecta layout generator) for 1-3 column CSS layouts, offers many options...
Menu builder for Stu Nicholls Vertical five deep menu will generate your code for you! Thanks Jerry Anzalone! :)
CSS tutorials, experiments, techniques, and tools. Been around for a while, and just keeps getting better!
Owen Briggs' classic CSS layout "boxes" have been around since I started learning CSS (looong time ago)
Code generator with a few styles to choose from
Great tutorial site, also the home of the famous Listamatic navmenu code examples. Helpful floating and selector tutorials are a must read.
This one's been around a while... Categorized list of free fonts. There's a lot of dingbats and dingfonts I haven't seen elsewhere