More Micro-frameworks: CSS search results:

Ink is a set of tools for quick development of web interfaces.
Bootstrap Tour
Quick and easy way to build your product tours with Twitter Bootstrap Popovers.
Kraken is a lightweight, mobile-first boilerplate for front-end web developers.
Bootstrap Modal
Extends Bootstrap's native modals to provide additional functionality.
A lightweight semantic grid framework for Sass and Bourbon.
Jeet Grid System | Smart CSS preprocessor grids
CSS preprocessor grid built with fractions and ratios to make columns flexible and your workflow fast.
GroundworkCSS's flexible grid system enables you to do rapid development and scales to fit any screen size, from handheld devices to large format televisions.
Bootstrap Arrows
A simple jQuery plugin and add-on to the popular Twitter Bootstrap framework to include the use of arrows at any angle in your UI designs.
BootPag - dynamic pagination jQuery plugin for twitter bootstrap
A responsive web framework that scales with your device.
An open-source CSS Authoring Framework.
Profound Grid | A grid system for fixed and fluid layouts
Profound Grid is a responsive grid system for fixed and fluid layouts. Built in SCSS, it gives you flexibility and full control. Profound Grid uses negative margins to calculate columns, so unlike with other grid systems, fluid layouts will look exactly the same in every browser.
Generate beautiful Twitter Bootstrap themes using the Adobe kuler / COLOURlovers color scheme

Similar results:

CSS Typography cheat sheet
Small roundup on CSS features that will enhance your web typography.
Completely unscientific way of testing CSS performance. Most of these tests will revolve around methodologies and techniques for determining effective CSS architecture. Put another way, I want to know what works best given a particular comparison of CSS strategies.
Utility that minifies CSS colors, example: min("white"); // minifies to "#fff"
A CSS redundancy analyzer that analyzes redundancy.
cssmin.js is a JavaScript port of YUICompressor's CSS minifier.
CSS minimizer unlike others. In addition to usual minification techniques it can perform structural optimization of CSS files, resulting in smaller file size compared to other minifiers.