Use rack middleware to handle sprockets preprocessing. Processing happens on requests to sprockets resources. This allows you to develop, check in, and deploy unprocessed sprockets resources and leave the processing to the middleware. Allows for optimizing by environment: never-cache, always-reprocess in development; cache, process-once in production (for example).

RakeAssets is a small Ruby Gem that contains some simple configurable Rake Tasks and dependancies for making compiling assets faster and easier.

Ram is an asset packaging library for any type of web project. \ It was originalyl adapted from the excellent Jammit gem, but without any Rails dependencies or tie ins. This provides both the CSS and JavaScript concatenation and compression that you'd expect, as well as YUI Compressor and Closure Compiler compatibility, ahead-of-time gzipping, built-in JavaScript template support, and optional Data-URI / MHTML image embedding.

Static asset packager and compressor with versioning and built-in view helpers. Compresses files only when they need compressing.

Simple static asset packaging. Compresses files only when they're updated.

Rest and HTML interface

This library is client that allows JavaScript clients to connect to the Rocket web socket server.

Processor for using yuicompressor to minify CSS/JS

Make your sprockets environment by one commend.

Opinionated asset packaging for Sinatra done well.

Optimize the assets of your Rails application without change any line of code.

Small Victories Ruby interface.

a cdn assets for sprockets, upload assets to upyun/qiniu

A command line web-asset optimisation tool

All the stuff that make front end web development fun, in one simple toolkit

Develop mobile application using apache cordova and ruby utilities.

A static site generator utilizing Haml and Sass

Instead of using the default assets managing style in rails 3.2, this gem will introduce a new way to manage your assets. This is still a prototype, the fullfledged version will publish soon.

Compresses Javascript & CSS files on the terminal. Usage: wbdv_packer [options] [filename] -c, --charset [CHARSET] Sets the output charset (CSS & JS). Default: utf-8 -l, --line-break [NUMBER] Sets the max output line width (CSS & JS). Default: 1337 -o, --optimize Sets code optimization on compress (JS Only). Default: true -p, --preserve Sets preserved semi-colons (JS Only). Default: true -s, --short Sets shortened local variables (JS Only). Default: true -v, --version Print version -h, --help Display this screen

this lib could bundle you css/js files in single file, encode images in base64, rewrite images urls to your cdn hosts