As many hackers enjoy the readability of markdown code, some stylings in hack.css are exactly the way markdown is.

Open source modular CSS framework providing great structure for building websites quickly

A Responsive Front-end Framework for Accessible and Semantic Websites.
Developed for design, turretcss is a styles and browser behaviour normalisation framework for rapid development of responsive and accessible websites.

• TurretCSS @ GitHub.

Mobility is a super light weight HTML, CSS, and JS mobile UI built on top of Bootstrap for developing mobile applications.

Those colorful filters uses css blend modes and were heavily inspired by Spotify new 2015 ads

This technic is called "DuoTone", and today, with the power of CSS we can play around with some blend-modes properties, to get some cool visual results.

piCSSel-art is a drawing app to draw pixel art and get it in CSS. Yes, you heard it right, CSS. The app converts each pixel to corresponsing box-shadow CSS and generate HTML and CSS code which you can use to put that art on your page.

Basscss is a lightweight collection of base element styles, immutable utilities, layout modules, and color styles designed for speed, clarity, performance, and scalability.

Pure css icons, with only one element.

• icono @ GitHub.

A collection of CSS3 powered hover effects to be applied to links, buttons, logos, SVG, featured images and so on. Easily apply to your own elements, modify or just use for inspiration. Available in CSS, SASS, and LESS.

You should use Skeleton if you're embarking on a smaller project or just don't feel like you need all the utility of larger frameworks. Skeleton only styles a handful of standard HTML elements and includes a grid, but that's often more than enough to get started. In fact, this site is built on Skeleton and has ~200 lines of custom CSS (half of which is the docking navigation).

In CSS we already have the selector ::first-line to apply style on the first line of element. But there is no selector like ::nth-line(), ::nth-last-line() or even ::last-line. Then I read an article A Call for ::nth-everything from CSS tricks. ::nth-line() is actually really useful in some situation.

csstyle is a modern approach for crafting beautifully maintainable stylesheets. The csstyle method is implemented using a set of SASS mixins that make your CSS readable and semantic, generate your selectors for you, and automatically handle things like specificity and nesting.

Pleeease is the best toolchain for your CSS. Just write DRY, future-proof CSS and Pleeease does the job for you*.

CSS.coloratum is a nifty little tool that helps you:

Share colors with friends and colleagues (never have to go through describing a shade again, just give them the link!)
Check out what RGB & HSL values correspond to that color keyword you keep using
Covert HSL to RGB, because you're done with your prototype and now it has to work in IE8 too
...and much more!

This isYet another megamenu for Bootstrap 3 from Twitter. Lightweight and pure CSS megamenu that uses the standard navbar markup and the fluid grid system classes from Bootstrap 3. Work for fixed and responsive layout and has the facility to include (almost) any Bootstrap elements.

Build mobile apps with simple HTML‚ CSS‚ and JS components.

Normalize.css makes browsers render all elements more consistently and in line with modern standards. It precisely targets only the styles that need normalizing.

Apache Cordova is a platform
for building native mobile
applications using HTML, CSS
and JavaScript

Unpack your css files to make them more readable.

Pushy is a responsive off-canvas navigation menu using CSS transforms & transitions.