Frontsau brings coffeescript, sass, less to any webapplication without big need of modifying it. No matter if your using wordpress, joomla, zend (only for the php ones)... and many more.

Sprockets + Thin to get you going with static content.

Merb plugin for less css

Gem that integrates Sidereel GroundworkCSS into Rails 3+

Define reusable functions in Haml that can be called with native Haml syntax.

Makes LESS less of a hassle on read-only filesystems by compiling and serving it up for you.

Hyde lets you create static websites from a bunch of files written in HAML, Textile, Sass, or any other.

SDK for Iugu Platform Applications

Laze is a simple static website generator, inspired by the likes of jekyll, bonsai, nanoc, webby and many others. It's main purpose is to convert a bunch of text files into a working website.

Monkey-patches the LessCSS library to expand CSS3 properties into browser-specific properties.

This gem contains development and built tools for creating MagLoft themes.

Compiles widgets and creates scaffolds for Materia run by Learning Systems and Technologies which is part of the Center for Distributed Learning at the University of Central Florida.

Malt provides a factory framework for rendering a variety of template and markup document formats.

A toolkit for bootstrapping and developing WordPress themes and plugins using Sass, LESS, and CoffeeScript.

MoCo monitors web templates. On updates the templates are compiled and the browser reloaded. MoCo currently supports CoffeeScript, Sass, LESS, Markdown and Haml. Mac OS X only.

A static site generator that supports code, photos and files.

Less.js CSS Framework That Picks Up Where Bootstrap Left Off.

LESS CSS preprocessing for Rack apps.

Rack middleware for compiling lesscss files into css

A(nother) HTML(5) generator for RDoc. It uses {Twitter Bootstrap}[http://twitter.github.com/bootstrap/] for the pretty, doesn't take up valuable horizontal real estate space with indexes and stuff, and has a QuickSilver-like incremental searching.