Development

API

• TestProject

Hacking

• Astalavista
• Bootstrike
• Cracking Forum
• Go Hacking
• Hack This Site

Tutorials

• Guru 99

Scripts

• Free Webshop
• Google Code
• Maian Script World
• NZs Finest
• Open Cart
• Scriptol
• Scripts
• The Script Club

CMS

Content Managment Systems

• Cabron2
• Cushy CMS
• Cute News
• Joomla
• Octopress
• OpenSource CMS
• WordPress
• Zimplit

JS

Javascript.

• Javascript Kit
• Javascript Kit
• Javascript Source
• JS From Hell

PHP

Pre Hypertext Preprocessor, the thing that makes most websites contributable by visiting users.

• PHP HQ
• PHP Junkyard
• PHP Shop
• Script Archive
• ScriptMe
• Totally PHP

phpBB

PHP Bulletin Board, one of my favorite free forum script systems.

• phpBB
• phpBB Hacks
• phpBB Platinum
• Smartor

WordPress

WordPress, a great (free) blogging/CMS system.

• CSS + JS
• Include Me

WordPress

• Blog Oh Blog
• Cats Who Code
• WP Candy
• WP Canyon
• WP Designer
• WP Garage
• WP Recipes

Design Stuff

• Canva
• Content Snippets
• CSS Tricks
• Deck Network
• Flat Icon
• Font Combiner
• Free Vector Maps
• Glyph Search
• Hongkiat
• Inliner
• Layers CSS
• Make Use Of
• MG Advertising Tools & Resources
• Silk Icons
• Silvrback
• Slidr
• Streme
• Webification

File Hosts

• Freehostina
• Image Socket
• Mega
• Netkups
• Sharefest
• Share SWF
• Speedyshare
• SWT Cabin
• Up A File