Use jQuery's autocomplete plugin with Rails 3.

Suspenders is a Rails plugin containing generators for configuring Rails applications. It is used by thoughtbot to get a jump start on a new or existing app. Use Suspenders if you're in a rush to build something amazing; don't use it if you like missing deadlines.

The speed of a single-page web application without having to write any JavaScript.

Official Geokit plugin for Rails/ActiveRecord. Provides location-based goodness for your Rails app. Requires the Geokit gem.

Supporting gem for Rails Panel (Google Chrome extension for Rails development)

Draper adds an object-oriented layer of presentation logic to your Rails apps.

Haml-rails provides Haml generators for Rails 5. It also enables Haml as the templating engine for you, so you don't have to screw around in your own application.rb when your Gemfile already clearly indicated what templating engine you have installed. Hurrah.

Simple, Heroku-friendly Rails app configuration using ENV and a single YAML file

An open source social networking platform in Ruby on Rails

Go faster, off the Rails

Annotates Rails Models, routes, and others

Adds methods to ActiveRecord::Migration to create and manage database views in Rails

Adds footnotes to each page in your Rails app, containing useful development information as well as links to edit the controllers and views in your editor.

Every Rails page has footnotes that gives information about your application and links back to your editor.

Library for validating urls in Rails.

Select2 is a jQuery based replacement for select boxes. It supports searching, remote data sets, and infinite scrolling of results. This gem integrates Select2 with Rails asset pipeline for easy of use.

The best Rails forums engine ever.

Fork of the latest authlogic code (should be working with rails3).

Use the GraphiQL IDE for GraphQL with Ruby on Rails. This gem includes an engine, a controller and a view for integrating GraphiQL with your app.

You probably meant `gem install sprockets-rails`.