- W3C HTML Reference
- W3C HTML5 Reference
- W3C Validator for HTML
- W3C CSS Reference
- W3C Validator for CSS
- HTML Tutorial For Beginners
- HTML5 Cheat Sheet
- CSS Priority Rules
- w3 JavaScript Tutorials
Learn JavaScript at W3C. - Interactive Javascript Tutorials
- How to open the JavaScript console in different browsers?
- W3C Schools AJAX Tutorial
- JQuery Tutorials
- 9 Principles of Web Design
- Rules for Exception Performance for your Website
- Things to Take into Account When Moving to Standards-Compliant HTML and CSS Authoring
- How to Conform an XHTML Document to W3C Standards
- Meta Tag Reference
All you need to (and didn't want to know) about Meta tags. In depth reference.
- W3 Color Schemes
- Web Developer's Guide to Colour
- 100 Beautiful Colour Schemes
- 9 Principles of Web Design
- Seek inspiration: Web Design Galleries
- 10 Principles of Web Design
- Floating CSS Positions
- Cooltext.com - Render Your Own Logos!!!!
- Adobe Kuler: Generate a Color Scheme From an Image
- Global Web Stats
- Generic Latin Text
- Principles of HCI
- Color Scheme Generator
- Basic Color Tutorial
- Free Link Checker by w3C
- Lynx Viewer
- Favicons!
- w3 Frames Tutorial
- Unsplash - Free Images
- Create Your Own 8-Bit Sprites at Piskel
- Pexels - Royalty Free Photos
- Burst - Royalty Free Photos
- OpenGameArt - Free game art
- Kenney - Game Assets for Free
- Wikimedia Commons
- Free Images
- NOAA's Copyright Free Images
- WikiPedia List of Free Image Resources
- Public Domain Photos.com - More Public Domain Photos!
- GIMP: Download, Tutorials, User Manual
- PHP Home Page
Online list of all PHP functions and PHP manual. - PHP Security Issues
- On the Security of PHP
- w3 PHP Tutorial
- PHP Resource Index
TONS of free to use PHP scripts including guestbooks and mailers. - Guru 99 PHP Tutorials
- Cloud Computing in English
- A Beginner's Guide to the Internet
- An Introduction to Computers
- Google Groups - Newsgroups
- Office Ergonomics Seminar
- File Extensions
- FOLDOC - Online Computing Dictionary
- Email Emoticons... ^-^
- A Beginner's Guide to Effective Email
- BABEL: Glossary of Computer Related Abbreviations and Acronyms
- McAfee Virus Information