- Smashing Magazine
- An essential source of information for all things web - from designers to developers, front-end and back.
- mir.aculo.us JavaScript
- A blog from Thomas Fuchs, the author of Zepto.js and script.aculo.us.
- Christian Heilmann
- A very interesting blog from the "Principal Developer Evangelist of the Mozilla Developer Network"
- Phpied
- A very nice PHP and JavaScript blog from Stoyan Stefanov, a Facebook engineer.
- Badass JavaScript
- Updated less frequently now, but full of examples from people that are pushing the boundaries of what JavaScript can do.
- QuirksBlog
- Up-to-date reports on browser compatibilities and any weird implementations that you might need to keep an eye on.
- CSS3 Generator
- This is so useful that I would marry it if I could...
- Ultimate CSS Gradient Generator
- ...but I would cheat on the above with this nifty tool in a heartbeat.