Document and view nice API docs.

Rails form helpers and form builder extensions that make it super easy to build Bootstrap 5 forms.

Patches ActionController::Parameters to let you easily permit parameters sometimes

A safe, browser-based Rails console you mount on your app.

Set of extensions to core rails libraries.

Rails engine, generators, ActiveJob support, inbox previews and rake tasks for Courrier.

Replace Rails' verbose logs with anything you like, from one-liner keys/values to even more verbose logging (it you think that's possible).

This tool helps you dig deeper through the Rails rendering stack using just your browser.

Keep your backend and front-end specs in sync! The rails_edge_test gem provides a dsl and rake task that uses your Rails app to generate json and appropriate wrapper files for use in your front-end testing.

Explicitly mark Rails methods as overridden

Session inter-operability for Rails 3.0 and 3.1+ apps

A bunch of frequently used HTML helpers for Rails apps.

Automatically add a `link` header directing clients to `preconnect` to your `asset_host` to HTML document responses in Rails.

This Rails plugin provides the rake task i18n:update to download the latest core translations to vendor/rails-locales. On application start, the plugin automatically prepends downloaded core translations to the I18n load_path. So the downloaded core translations are automatically used in your app...

Rails Engine that captures exceptions, stores them in your database with rich context, and exposes error data via a bundled MCP server so AI agents can triage, resolve, and fix errors autonomously.

Enhances Rails inheritable attributes to ensure that changes to super classes are passed on to the subclasses

jQuery File Upload by Sebastian Tschan integrated for Rails >= 3.1 Asset Pipeline

Helper for displaying a localised <select> of languages using the ISO 369 standard or your own custom data source.

This gem provides an extraction of the DeprecatedMapper from Rails 3.0. If you have a legacy application with an old style routes.rb file this allows you to get your application running quickly in Rails 3.1.

Simple menu generator for Ruby on Rails