geuis/helium-css · GitHub
Helium is a tool for discovering unused CSS across many pages on a web site
Coding for Retina on the web
3+ Ways to Preload Images Using CSS, JavaScript, or Ajax • Perishable Press
spin.js
Generate a cross-browser spinner in CSS
Don’t use IDs in CSS selectors?
Image Cross Fade Transition with jQuery
Fade one image into another @rem