“Color: From Hexcodes to Eyeballs” is one of the best articles on color theory and the relationship between color coding, hardware, and human color perception, that I’ve seen in a long while. Scratch that. That I’ve seen EVER!
I was already somewhat familiar with the subject, so I scrolled through the article twice, quick read it, and will have to spend even more time with it. But if you want to really understand how this part of technology works with humans, it’s the best resource that I can send you to.
“Lesser known CSS quirks & advanced tips” is a collection of some really weird CSS features and behaviors. These are good to know, as sometimes they can shed some light on strange results or help with implementation of a particular design feature, where no other options are applicable.
“A Comprehensive Guide To Web Design” is a rather lengthy article that focuses on the non-technical bits of the web design. It’s not about the tools and technologies, but more about the meaning and good practices. The article covers the design of navigation, content, call to action, web forms, accessibility, and other important bits which are frequently forgotten.
idg is a very handy tool for programmatically generating images which look like documents and web page templates. It’s built on top of the ImageMagick and will come native to anyone familiar with the modern grid-based web design.