FitText makes font-sizes flexible. Use this plugin on your fluid or responsive layout to achieve scalable headlines that fill the width of a parent element.

 CleanSlate

CleanSlate is an extreme CSS reset stylesheet. It is used to reset the styling of an HTML element and all its children, back to default CSS values. It is composed exclusively of !important rules, which override all other types of rules.

A responsive CSS grid system helping desktop and mobile browsers play nicely together.

The Columnal CSS grid system is a “remix” of a couple others with some custom code thrown in. The elastic grid system is borrowed from cssgrid.net, while some code inspiration (and the idea for subcolumns) are taken from 960.gs.

Sprite Cow helps you get the background-position, width and height of sprites within a spritesheet as a nice bit of copyable css.

Powerful New CSS Techniques and Tools

A quick and simple service for getting pictures of kittens for use as placeholders in your designs or code. Just put your image size (width & height) after our URL and you’ll get a placeholder.

CSS3 Generator

You hate writing vendor prefixes for all browsers? Just let CSSPrefixer do it for you!

Creating HTML Emails – How To And Design Inspiration