A toolkit for building modeling frameworks like Active Record. Rich support for attributes, callbacks, validations, serialization, internationalization, and testing.

Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes. Strong conventions for associations, validations, aggregations, migrations, and testing come baked-in.

Web apps on Rails. Simple, battle-tested conventions for building and testing MVC web applications. Works with any Rack-compatible server.

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.

Rails internals: application bootup, plugins, generators, and rake tasks.

Email on Rails. Compose, deliver, and test emails using the familiar controller/view pattern. First-class support for multipart email and attachments.

Simple, battle-tested conventions and helpers for building web pages.

Declare job classes that can be run by a variety of queuing backends.

Structure many real-time application concerns into channels over a single WebSocket connection.

Attach cloud and local files in Rails applications.

Receive and process incoming emails in Rails applications.

Edit and display rich text in Rails applications.

EXtended http(s) CONnections

factory_bot provides a framework and DSL for defining and using factories - less error-prone, more explicit, and all-around easier to work with than fixtures.

Sprockets Rails integration

This gem can compare doms and assert certain elements exists in doms using Nokogiri.

URIs for your models makes it easy to pass references around.

Spree Models, Helpers, Services and core libraries

bootstrap-sass is a Sass-powered version of Bootstrap 3, ready to drop right into your Sass powered applications.

The CocoaPods-Core gem provides support to work with the models of CocoaPods. It is intended to be used in place of the CocoaPods when the the installation of the dependencies is not needed.