Most Popular Gems

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.

Puma is a simple, fast, multi-threaded, and highly parallel HTTP 1.1 server for Ruby/Rack applications. Puma is intended for use in both development and production environments. It's great for highly parallel Ruby implementations such as JRuby and TruffleRuby as well as as providing process worker support to support CRuby well.

Boot large ruby/rails apps faster

Capybara is an integration testing tool for rack based web applications. It simulates how a user would interact with a website

Pg is the Ruby interface to the PostgreSQL RDBMS. It works with PostgreSQL 9.3 and later.

Official AWS Ruby gem for Amazon Simple Storage Service (Amazon S3). This gem is part of the AWS SDK for Ruby.

A debugging tool for your Ruby on Rails applications.

WebMock allows stubbing HTTP requests and setting expectations on HTTP requests.

Faker, a port of Data::Faker from Perl, is used to easily generate fake data: names, addresses, phone numbers, etc.

TZInfo::Data contains data from the IANA Time Zone database packaged as Ruby modules for use with TZInfo.

Selenium implements the W3C WebDriver protocol to automate popular browsers. It aims to mimic the behaviour of a real user as it interacts with the application's HTML. It's primarily intended for web application testing, but any web-based task can automated.

The speed of a single-page web application without having to write any JavaScript.

A Ruby client that tries to match Redis' API one-to-one, while still providing an idiomatic interface.

Debugging functionality for Ruby. This is completely rewritten debug.rb which was contained by the ancient Ruby versions.

rspec-rails integrates the Rails testing helpers into RSpec.

Simple, efficient background processing for Ruby.

bcrypt() is a sophisticated and secure hash algorithm designed by The OpenBSD project for hashing passwords. The bcrypt Ruby gem provides a simple wrapper for safely handling passwords.

A modest JavaScript framework for the HTML you already have.

factory_bot_rails provides integration between factory_bot and rails 5.0 or newer

Automatic Rails code style checking tool. A RuboCop extension focused on enforcing Rails best practices and coding conventions.

Sprockets Rails integration

Create JSON structures via a Builder-style DSL

High-level wrapper for processing images for the web with ImageMagick or libvips.

The Listen gem listens to file modifications and notifies you about the changes. Works everywhere!

Code coverage for Ruby with a powerful configuration library and automatic merging of coverage across test suites