Rails mail_to helper with encoding (removed from core in Rails 4.0)

Add drag and drop reordering to ActiveAdmin tables.

Plugin for running methods on ActiveRecord models after record is committed

animate.css for rails

Ships backbone and underscore to your Rails 3.1 application through the new asset pipeline. Rails 3.0 is supported via generators.

Bandit provides a way to do multi-armed bandit optimization of alternatives in a rails website

Allows caching of pages with flash messages by rendering flash messages from a cookie using JavaScript, instead of statically in your Rails view template. Flash contents are converted to JSON and placed in a cookie by an after_filter (default) or a Rack Middleware (option).

Wraps CanCan and RoleModel up to make role based authorisation really easy in Rails 3.x.

Capybara API that knows how to wait for Angular in end to end specs

The spicy feature toggle framework

Generates a time_select field like Google calendar.

Configurable is a Rails 4 engine that allows you to set up config variables in a config file, specifying default values for all environmentspec. These variables can then be set on a per-app basis using a user facing configuration screen.

This gem generates nicer default views styled with Tailwindcss so you have a bit of a better starting point for your app.

Generates simple and extendable controller, views and helpers that support you to DRY up the CRUD code in your Rails project. Start with these elements and build a clean base to efficiently develop your application upon.

Add web components to the Rails asset pipeline

integrated library system

integrated library system

Tracking exceptions for Rails application store them in database by exception_notification gem.

Preload factories (Factory Bot) just like fixtures. It will be easier and, probably, faster!

This gem provides jQuery FancyBox 2 for your Rails 3.1/4.0 application. This gem is based on the gem for Fancybox 1.x by Chris Mytton