Sprockets is a Rack-based asset packaging system that concatenates and serves JavaScript, CoffeeScript, CSS, Sass, and SCSS.

Capybara is an integration testing tool for rack based web applications. It simulates how a user would interact with a website

Sprockets Rails integration

bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.

MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out http://127.0.0.1:1080 to see the mail.

The most popular HTML, CSS, and JavaScript framework for developing responsive, mobile first projects on the web. http://getbootstrap.com

A fully featured and advanced HTML5 WYSIWYG editor written in CoffeeScript on top of the Rails 3.1 asset stack

A fully featured and advanced HTML5 WYSIWYG editor written in CoffeeScript on top of the Rails asset pipeline

After you run assets:precompile your compiled assets will be synchronised with your S3 bucket.

Quickly setup backbone.js for use with rails 3.1 and above apps. Generators are provided to quickly get started.

Use jQuery's autocomplete plugin with Rails 3.

Genghis is a single-file MongoDB admin app, made entirely out of awesome.

A drop-in Jekyll Plugin that provides an asset pipeline for JavaScript, CSS, SASS, SCSS. Based around Sprockets (from Rails) and just as powereful it provides everything you need to manage assets in Jekyll.

Use your angular templates with rails' asset pipeline

CMS for Rails. For Reals.

Calagator is an open source community calendaring platform

Use lunr.js to provide simple full-text search, using JavaScript in your browser, for your Jekyll static website.

Package your assets for Sinatra.

Chanko is a Rails extension tool

Use jQuery's autocomplete plugin with Rails 4+.