SVG Gradient Background Maker
Handy
The ultimate CSS tools for web designers | CSSmatic
Gradient generator, border radius, noise and box shadow
geuis/helium-css · GitHub
Helium is a tool for discovering unused CSS across many pages on a web site
24 ways: Front-end Style Guides
Links to Style Guides
Typeplate » A typographic starter kit encouraging great type on the Web
A neat typographic starter kit
❍ IcoMoon
Custom built and crisp icon fonts, done right
Free Mobile Performance Testing with Akamai's Mobitest
Test your website performance on a mobile device
Humans TXT: We Are People, Not Machines.
We Are People, Not Machines
The Grid System
The grid system is an aid, not a guarantee. It permits a number of possible uses and each designer can look for a solution appropriate to his personal style. But one must learn how to use the grid; it is an art that requires practice.
WebPagetest - Website Performance and Optimization Test
ProtoFluid - HTML5 and CSS3 Web App Prototyping
Test your @media queries and web app on various screen sizes
CSS3 Please! The Cross-Browser CSS3 Rule Generator
You can edit the underlined values in this css file but don't worry about making sure the corresponding values match, that's all done automagically for you.
Why Corporations Don’t Upgrade IE6 and How Chrome Frame Could Help
Google's cleaver solution to IE's legacy
Icons for Interaction
Jon Hicks' @media 2009 slides