Ajax.org Cloud9 Editor
Link header pagination for Rails and Grape APIs.
Give your JS App some Backbone with Models, Views, Collections, and Events
awesome model binding for Backbone.js
A validation plugin for Backbone.js that validates both your model as well as form input
WYSIWYG editor for Bootstrap, integrated in Rails assets pipeline
Library to help reading and writing CSV files
Flexible authentication solution for Rails with Warden.
An invitation strategy for devise
Open Source, Distributed, RESTful Search Engine
Fluent Migrations framework for .net
Guard is a command line tool to easily handle events on file system modifications.
Highly customizable checkboxes and radio buttons (jQuery & Zepto)
A turn-key Vim configuration for Ruby and Rails development.
Ruby ODM framework for MongoDB
acts_as_paranoid for Rails 3
Ruby on Rails
A rich Ruby client for Riak, Basho's distributed database
Forms made easy for Rails! It's tied to a simple DSL, with no opinion on markup.