Take full control of the DOM with Turbo Streams

Turkee will help you to easily create usability studies, post HITs, and retrieve the user entered values from Mechanical Turk.

Shopify Experiments classes

Add a validation filter to your controller.

Abracadabra: The gem that swaps out text with a fully-compliant Rails form in one click using JQuery and rails.js.

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

Wraps the Aliyun OSS as an Active Storage service.

Plugin for running methods on ActiveRecord models after record is committed

Define custom health checks for your app (as in: are there any new users in the past 24 hours) and see the results in a simple /healthcheck page that you can use to monitor your production app with UptimeRobot, Pingdom, or other monitoring services. It's also useful as a drop-in replacement for t...

Trail audit logs (Operation logs) into the database for user behaviors, including a web UI to query logs.

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

Wrappers for JavaScript alert(), confirm() and other flexible dialogs using Twitter's bootstrap framework for Rails 3.1+

CMS built on rails with love.

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

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