320 and up by Andy Clarke takes on the notion that when using responsive design with media queries small devices load assets they don’t need. This technique uses a tiny stylesheet first, and loads larger assets only when needed.
Writing files from code, whether it be from a theme or from a plugin, is generally bad mojo. However understanding why you shouldn’t is confusing to many, and then understanding why you shouldn’t do-it-yourself and should use the WP_Filesystem is even more confusing.
A great writeup by Otto on how, why, and when to use WP_Filesystem to write files from a WordPress theme or plugin, including code samples and a demo plugin.
In the spirit of Ian’s post about responsive web design and the discussion ensued from it, here is a collection of examples of said practice and technique (not constrained to WordPress sites). Several good designs on display there.
ChaosTheory—a dark, single-column theme developed exclusively for WordPress.com—is now available in the official WordPress Themes Directory.
Dust-Me Selectors is a Firefox extension that finds unused CSS selectors by inspecting your stylesheet and comparing the rules with the elements in your markup.
A must-have for your webcraft toolbelt.
If you’re designed out for the day and need something sufficiently geeky to bring you back to midfield, I suggest Andy Skelton’s excellent writeup about a lesser-known but oft-used WordPress string formatting function, WordPress code surprise: wp_sprintf.
For those that fancy doing web design and debugging on Webkit browsers, here is a recently announced round of improvements.
I personally shall appreciate the fact that color values are rendered as originally written —if desired—, which should make experimenting and copying from the browser to the original stylesheet much easier, by preserving the chosen code style. The style presentation and persisting changes add-ons are equally neat.
Maven Pro is a relatively new sans-serif font designed by Joe Prince and offered for free to use. The typeface includes support for basic Latin and western European diacritics, with new weights in development.
Toolbox 1.1, built for WordPress 3.1 and up, is now available in the official WordPress Themes Directory. Have at it!