Harp intelligently compiles assets as the browser needs them, so it’s insanely fast. All you have to do is Save and Refresh. You can keep your code clean and organized: reuse common elements with partials, and maintain a consistent site design with layouts. Whether you’re making a GitHub project page, or a mobile application using Apache Cordova/PhoneGap, you can easily compile your code to HTML, CSS & JavaScript and host it anywhere.

The Pixi renderer allows everyone to enjoy the power of hardware acceleration without prior knowledge of webGL.

It’s a cross-browser library that provides new custom HTML tags to abstract away common user interface patterns into easy-to-use, flexible, and semantic Web Components.

Built on Mozilla’s x-tags library, Brick allows you to plug simple HTML tags into your markup to implement widgets like sliders or datepickers, speeding up development by saving you from having to initially think about the under-the-hood HTML/CSS/JavaScript.

• Markdown, or HTML for publishing.
• Drag and Drop for CSS, JavaScript, or even images.
• Fully i18n compatible. Translate it when you’re ready.
• Custom hooks
• Extensible and Themeable

A sophisticated 12 column CSS grid system with a concise, uncluttered syntax, adjustable gutters, unlimited nesting support and many more cool features. A streamlined replacement for CSS media queries designed to handle all of your responsive needs. Simple to configure, built to handle any number of breakpoints, and capable of doing much more than simply shuffle stylesheets.

Everything is very-well documented with examples and a web-based customizer exists for creating new themes (there are already 3 ready-to-choose themes).

LESS is the dynamic stylesheet language, it extends CSS with dynamic behavior such as variables, mixins, operations and functions. LESS runs on both the server-side (with Node.js and Rhino) or client-side (modern browsers only).

If you would like to receive our daily updates and keep up to date with the latest and greatest articles and resources from the design/developer community, you can subscribe to our Full RSS Feed, follow us on Twitter and Facebook.

The Dynamic Stylesheet Language – LESS

LESS App for Mac OSX

LESS Compiler Written in PHP: Less PHP

The LESS Editor and Compiler: Crunch

Preprocessing Got Easier With Prepros

DMXzone LESS CSS Compiler

Rapid Prototyping With Preprocessing, Minification, Concatenation & Optimisation

Windows GUI for LESS: WinLess

GUI Compiler for LESS: Plessc (Linux)

Pack of Mixins and Variables to Use With LESS: Preboot

Set of Basic Mixins for the LESS CSS: LESS Elements

CSS Frameworks with LESS Support

The Spiritual Successor to LESS Framework: Frameless Grid

The Semantic Grid System

A LESS CSS Library

Powerful Front End Framework: Bootstrap

Convert 960 CSS Framework to LESS Format

Joomla Extension for Compiling LESS Files

Joomla Plugin to Automatically Compile LESS Templates Files on Page Load

If you would like to receive our daily updates and keep up to date with the latest and greatest articles and resources from the design/developer community, you can subscribe to our Full RSS Feed, follow us on Twitter and Facebook.

Pure is meant to be a starting point for every website or web app. We take care of all the CSS work that every site needs, without making it look cookie-cutter.

• A solid base built on Normalize.css to fix cross-browser compatibility issues
• Styles for vertical and horizontal menus, including support for dropdown menus
• An extremely minimalist look that is super-easy to customize
• Responsive by default, with a non-responsive option
• Easy one-click customization with the Skin Builder
• Extremely small file size: 4.8KB minified + gzip