The simply the best collection of CSS
A FLOSS PHP class for generating PDF documents. Features UTF-8 and RTL; all standard page formats, custom page formats, custom margins and units of measure; methods to publish some XHTML + CSS code, Javascript and forms; supports JPEG, PNG and SVG images natively, all images supported by GD; and more.
A CSS pre-processor that extends the CSS language, adding features that allow variables, mixins, functions and many other techniques to make CSS that is more maintainable, themable and extendable. Less runs inside Node, in the browser and inside Rhino. There are also 3rd party tools that allow you to compile your files and watch for changes.
A lightweight jQuery plugin for radical web typography.
A JavaScript library that detects HTML5 and CSS3 features in the users browser. It creates a JavaScript object with the results, and adds classes to the html element for you to key your CSS on.
Tram takes CSS transitions and defines them in JavaScript. Offers a powerful API with auto-stopping, sequencing and cross-browser fallbacks.
A set of small, responsive CSS modules that you can use in every web project. Crafted with mobile devices in mind. Responsive out of the box, so elements look great on all screen sizes. Customize your styles with the Skin Builder to make your style your own. Plays well with other libraries including Bootstrap and jQuery.
A simple jQuery pagination plugin with 3 CSS themes and Bootstrap support.