- UglifUI: http://alexsexton.com/uglifui/
- cssmin: http://tools.w3clubs.com/cssmin/ (post)
- Smush.it: http://www.smushit.com/ysmush.it/
- Spritecow: http://www.spritecow.com/
- css3please: http://css3please.com/
- border-radius: http://border-radius.com/
- http://mothereffinghsl.com/
- http://mothereffingtextshadow.com/
- html5readiness: http://html5readiness.com/
- caniuse: http://caniuse.com/
- es5-compat-table: http://kangax.github.com/es5-compat-table/