ActiveJob allows declaring job classes in a common way across Rails applications.

Provides Sprockets implementation for the Rails Asset Pipeline.

ActiveStorage integrates file storage services with Rails applications, allowing files to be attached to ActiveRecord models.

Action Cable integrates WebSockets with Rails applications. Through WebSockets it allows for real-time features in web applications.

This gem is used to handle HTML sanitization in Rails applications. If you need similar functionality in non Rails apps consider using Loofah directly.

Import maps can import JavaScript modules using logical names that map to versioned/digested files -- directly from the browser. It makes it possible to build modern JavaScript applications using JavaScript libraries made for ES modules (ESM) without the need for transpiling or bundling, which removes the need for Webpack, Yarn, npm, or any other part of the JavaScript toolchain. All that is needed is the asset pipeline that is already included in Rails.

The With advisory lock gem adds advisory locking to ActiveRecord for PostgreSQL and MySQL. SQLite is also supported, but this uses the file system for locks.

Ruby on Rails is a full-stack web framework optimized for programmer happiness and sustainable productivity. It encourages beautiful code by favoring convention over configuration.

This library integrates the SASS stylesheet language into Ruby on Rails.

GlobalID provides a way to generate URIs from a model in Ruby that uniquely identify it.

ActionMailbox receives and processes incoming emails in Rails applications.

Active Record connects classes to relational database table to establish an almost zero-configuration persistence layer for applications.

This package provides support for using RSpec to test Ruby on Rails applications, in pace of the default Minitest testing library.

Bootsnap is a library that plugs into Ruby, with optional support for YAML, to optimize and cache expensive computations.

ActionView provides conventions and helpers for building web pages in Ruby.

This package provides a Ruby wrapper for the MRI 2.0 debug_inspector API.

Propshaft is an asset pipeline library for Rails. It's built for an era where bundling assets to save on HTTP connections is no longer urgent, where JavaScript and CSS are either compiled by dedicated Node.js bundlers or served directly to the browsers, and where increases in bandwidth have made the need for minification less pressing. These factors allow for a dramatically simpler and faster asset pipeline compared to previous options, like Sprockets.

This package provides a toolkit for building modeling frameworks like Active Record. ActiveSupport handles attributes, callbacks, validations, serialization, internationalization, and testing.

This package allows you to create an interactive Ruby session in your browser. Those sessions are launched automatically in case of an error and can also be launched manually in any page.

ActionText edits and displays rich text in Rails applications.

ActionPack provides conventions for building and testing MVC web applications. These work with any Rack-compatible server.

This package provides a modest JavaScript framework for the HTML you already have.

Sprockets is a Rack-based asset packaging system that concatenates and serves JavaScript, CoffeeScript, CSS, LESS, Sass, and SCSS.

Compose, deliver, receive, and test emails using the controller/view pattern. Including support for multipart email and attachments.