Web Development Tools

Apache
MySQL
PhP
PhPFreaks

Security Tools for PC's

AVG - free antivirus software
SpyBot S & D - free spyware scanner/remover
Zone Alarm - free firewall

Web Server Tools

Securing RedHat Linux - The manual
Securing RedHat - University of Illinois at Chicago
Securing Apache - Security Focus
Securing Apache on Linux - Linux.com
Apache Mods
Regexp tutorial
Mod_rewrite - A beginner's guide to using mod_rewrite