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.

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

Upload files in your Ruby applications, map them to a range of ORMs, store them on different backends.

Easy upload management for ActiveRecord

ActiveModel::Serializers allows you to generate your JSON in an object-oriented and convention-driven manner.

Forms made easy!

The Database Toolkit for Ruby

Mongoid is an ODM (Object Document Mapper) Framework for MongoDB, written in Ruby.

ActiveModel/Record integrations for Elasticsearch.

Intelligent search made easy with Rails and Elasticsearch or OpenSearch

Draper adds an object-oriented layer of presentation logic to your Rails apps.

Essential models, mailers, and classes for the Solidus e-commerce project.

REST on Rails. Wrap your RESTful web app with Ruby classes and work with them like Active Record models.

An unobtrusive ruby authentication library based on ActiveRecord.

Persistence layer for Ruby models and Elasticsearch.

Library for validating urls in Rails.

XML serialization for your Active Model objects and Active Record models - extracted from Rails

Devise-Two-Factor is a minimalist extension to Devise which offers support for two-factor authentication through the TOTP scheme.