General how-to's/introductions
Pixel2Life.com
Php
PHP.net
PHP Wiki
WAMP Server*
PHP Triad*
Appservnetwork*
MySQL
Dev.MySQL.com
JavaScript
Quirksmode
JavaScript.Internet.com
JavaScript Wiki
JavaScript function reference
Misc
Google - Everything
Webmasterstop - Mod_rewrite
* = Used to develop web sites on your own computer. Just download and install the programs.
If you have any more good references, feel free pm me or another mod, and we'll add it to the list.. Make sure it's not a link to some tutorial site, but a site that's dedicated to that subject, or has an article with really great info on the subject.
Update: For those that use Firefox, heres a few plugins to make answering your questions a little easier.
Mozdev.org
Edited by rc69, 12 December 2007 - 12:39 AM.