Here is a list of links collected for easy reference. All of these links are an excellent resource for those wanting to learn (and improve upon) HTML, CSS, Scripts and so forth.
If you would like to see a link here that I have omitted, please feel free to contact me.

It can be difficult to sort through the huge amount of Information on the W3C site, so here are a few important ones.

≡ First Time Visitor Page - address may change.
≡ HTML 4.01 Specifications
≡ XHTML 1.0 Specifications
≡ CSS 1 Specifications
≡ CSS 2 Specifications
≡ Document Object Model (DOM) Level 1 Specification
≡ HTML Validator
≡ CSS Validator
≡ Dave Raggett's HTML Tidy
≡ Web Content Accessibility Guidelines 1.0

This covers all kinds of reference, tutorials, guides and FAQ's.

≡ Dave Raggett's Introduction to HTML and CSS
≡ HTML for the conceptually challenged
≡ A Slackers guide to HTML
≡ Webmonkey.com
≡ htmlgoodies
≡ O'Reilly.com
≡ The Web reference library

This covers all kinds of reference, tutorials, guides and FAQ's.

≡ Westciv CSS Tutorial - Thorough CSS tutorial.
≡ CSS Positioning Reference Sheet, Ian Graham
≡ WDG's Guide to Cascading Style Sheets
≡ W3Schools - CSS quick reference
≡ The HTML Writers Guild's CSS FAQs
≡ Zvon's CSS2 reference
≡ Westciv Browser Support
≡ Webreference - Advanced CSS Layouts Step by Step
≡ The Layout Reservoir page layouts with CSS
≡ Glish - CSS layout techniques. Box hack - important!
≡ Blooberry.com
≡ The Noodle Incident - Problem & Workaround Set for a series of CSS Boxes
≡ Eric Meyers CSS Site - Highly Recommended!
≡ CSS Pointers Group.
≡ CSS Zen Garden - Highly Reccomended!

This covers all kinds of reference, tutorials, guides and FAQ's.

≡ Superb manual on PHP.
≡ PHP Scripts.
≡ The PHP Resources Index.

Some of the main browsers in use..

≡ Mozilla/Firefox
≡ Netscape
≡ Internet Explorer
≡ Internet Explorer Mac
≡ Opera

≡ HTML-Kit
≡ Style Master CSS editor
≡ Layout Master editor

A random collection of links that can be of interest/use

≡ The Web Robots Pages - Web Wanderers, Crawlers, Spiders and other nasties!
≡ Search Engine Watch - The best source on search engine information.
≡ dmoz - Open Directory Project - The largest human-edited directory of the Web.
≡ What is? - The best online database of all technical terms.
≡ Slayer Office - Very good site written by a chappie known as S.G. Chapman.
≡ Eurogamer - Excellent games site, with a great forum :)
≡ Waterford History - A nice personal website detailing some aspects Waterford's (Ireland) history.
≡ DNS Stuff - A site enabling to trace and locate the origins of Domain Names and IP addresses
≡ Cartmel Bar - A site from a talented young artist by the name of Harry