ActionController::Parameters does not inherit Hash since Rails 5.0. This Gem will never cause an error even if you call Hash's method on ActionController::Parameters.

Simple event sourcing.

Controller generators with responders and shoulda-matchers

Exceptionally abstracts your exception logic to make raising and returning meaningful errors in Ruby on Rails easier.

A Rails engine for handling error pages.

Rails exception handling happens with ActionController extension and Mongoid support.

Provides optional javascript url helpers, CORS configuration and a pool of routes into which applications can dump their host information and routing table. Other applications can then utilize application namespaced helper methods for redirecting, drawing links, placing cross-origin XHR requests,...

Use ExecJS to write your views in JavaScript.

This gem automatically instruments your Ruby on Rails 4.2/5.x applications using InfluxDB for storage.

A rails engine for enabling A/B and other experiments.

Exportable will help you in exporting ActiveRecord models in to different output formats including CSV, XLS etc.

Adds a class method to all ActiveRecord models in Rails that exports all rows in a single CSV file to an Amazon S3 bucket

A helper for creating declaretive interface for decent_exposure queries

A very simple and boring blogging engine for Rails.

Allows managed content pages in a Ruby on Rails 3.1+ application.

An extension of simple_form, add layout function and add input controls based on bootstraps.

Rails 3 Renderer for JSON compatible with Sencha Extjs 3+

This gem allows you to specify permissions at controller action or helper methods levels.

It exposes `/globalize/translations.json` with JSON of all translations in the app

Simple Token-based security for Rails Apps