Awesome Ruby

A collection of awesome Ruby libraries, tools, frameworks and software. The essential Ruby to build modern Apps and Web Apps.

Inspired by the awesome-* trend on GitHub.

The goal is to build a categorized community-driven collection of very well-known resources.

Sharing, suggestions and contributions are always welcome! Please take a look at the contribution guidelines and quality standard first.

Thanks to all contributors, you’re awesome and wouldn’t be possible without you!

Awesome Ruby
Services and Apps
Resources
Other Awesome Lists

Abstraction

ActiveInteraction - Manage application specific business logic.
Cells - View Components for Rails
Interactor - Interactor provides a common interface for performing complex interactions in a single request
Light Service - Series of Actions with an emphasis on simplicity.
Mutations - Compose your business logic into commands that sanitize and validate input
Reform - Form objects decoupled from models.

Admin Interface

ActiveAdmin - a Ruby on Rails framework for creating elegant backends for website administration
bhf - A simple to use Rails-Engine-Gem that offers an admin interface for trusted user
RailsAdmin - A Rails engine that provides an easy-to-use interface for managing your data

Analytics

Ahoy - A solid foundation to track visits and events in Ruby, JavaScript, and native apps
Gabba - Simple way to send server-side notifications to Google Analytics
Legato - Model analytics reports and queries against the official Google Analytics Reporting API
Staccato - Track analytics into the official Google Analytics Collection API

API Builder

ActiveModel::Serializers - JSON serialization of objects
Crêpe - The thin API stack
Grape - An opinionated micro-framework for creating REST-like APIs in Ruby
jbuilder - Create JSON structures via a Builder-style DSL
JSONAPI::Resources - JSONAPI::Resources, or “JR”, provides a framework for developing a server that complies with the JSON API specification.
Jsonite - A tiny, HAL-compliant JSON presenter for your APIs
Pliny - Opinionated template Sinatra app for writing excellent APIs in Ruby
rabl - General ruby templating with json, bson, xml, plist and msgpack support
Rails::API - Rails for API only applications
Roar - Resource-Oriented Architectures in Ruby

Assets

Less Rails - The dynamic stylesheet language for the Rails asset pipeline.
Less - Leaner CSS, in your browser or Ruby.
Sass - Sass makes CSS fun again
Management:
- Rails Assets - Bundler to Bower proxy
- Sprockets - Rack-based asset packaging system

Authentication and OAuth

Authlogic
Clearance - Small and simple email & password based authenticaton for Rails
Devise - A flexible authentication solution for Rails based on Warden
OmniAuth - A library that standardizes multi-provider authentication utilizing Rack middleware
Sorcery - Magical Authentication for Rails 3 and 4
OAuth:
- Doorkeeper - An OAuth2 provider for Rails
- OAuth2 - A Ruby wrapper for the OAuth 2.0 protocol

Authorization

Authority ORM-neutral way to authorize actions in your Rails app.
CanCanCan
Pundit - Minimal authorization through OO design and pure Ruby classes

Caching

Action caching for Action Pack - Action caching for Action Pack
Dalli - A high performance pure Ruby client for accessing memcached servers
Record Cache - Cache Active Model Records in Rails 3

CLI Builder

Commander - The complete solution for Ruby command-line executables
GLI - Git-Like Interface Command Line Parser
Main - A class factory and DSL for generating command line programs real quick
Rake - A make-like build utility for Ruby
Slop - Simple Lightweight Option Parsing
Thor - A toolkit for building powerful command-line interfaces

CMS

Alchemy CMS - A powerful, userfriendly and flexible Open Source Rails CMS
LocomotiveCMS - A simple but powerful CMS based on Liquid templates and Mongodb database
Publify - A self hosted Web publishing platform on Rails
Radiant - A no-fluff, open source content management system designed for small teams
Refinery CMS - An open source Ruby on Rails content management system for Rails 3 and 4

Code Analysis and Metrics

Brakeman - A static analysis security vulnerability scanner for Ruby on Rails applications.
Flay - Flay analyzes code for structural similarities. Differences in literal values, variable, class, method names, whitespace, programming style, braces vs do/end, etc are all ignored. Making this totally rad.
Flog - Flog reports the most tortured code in an easy to read pain report. The higher the score, the more pain the code is in.
fukuzatsu - Complexity analysis tool with a rich web front-end.
MetricFu - A fist full of code metrics
rails_best_practices - A code metric tool for rails projects
Reek - Code smell detector for Ruby
Rubocop - A static code analyzer, based on the community Ruby style guide.
Rubycritic - A Ruby code quality reporter.
SimpleCov - Code coverage for Ruby 1.9+ with a powerful configuration library and automatic merging of coverage across test suites.

Coding Style Guides

Rails style guide - Community-driven Rails best practices and style for Rails 3 and 4
RSpec style guide - Better Specs { rspec guidelines with ruby }
Ruby style guide - Community-driven Ruby coding style

Concurrency

Celluloid - Actor-based concurrent object framework for Ruby
Concurrent Ruby - Modern concurrency tools including agents, futures, promises, thread pools, supervisors, and more. Inspired by Erlang, Clojure, Scala, Go, Java, JavaScript, and classic concurrency patterns.
EventMachine - An event-driven I/O and lightweight concurrency library for Ruby

Configuration

Configatron - Simple and feature rich configuration system for Ruby apps
Configus - Helps you easily manage environment specific settings
dotenv - Loads environment variables from .env
Econfig - Flexible configuration for Rails applications
Figaro - Simple, Heroku-friendly Rails app configuration using ENV and a single YAML file
Global - Provides accessor methods for your configuration data
RailsConfig - Multi-environment yaml settings for Rails3

Core Extensions

ActiveSupport - A collection of utility classes and standard library extensions.
Ruby Facets - The premiere collection of general purpose method extensions and standard additions for Ruby.
Attributes
- ActiveAttr - What ActiveModel left out
- FastAttributes - FastAttributes adds attributes with their types to the class
- Virtus - Attributes on Steroids for Plain Old Ruby Objects
Hash
- Hashie - A collection of tools that extend Hashes and make them more useful

Country Data

Carmen - A repository of geographic regions
Countries - All sorts of useful information about every country packaged as pretty little country objects
i18n_data - country/language names and 2-letter-code pairs, in 85 languages, for country/language i18n
normalize_country - Convert country names and codes to a standard, includes a conversion program for XMLs, CSVs and DBs

Dashboards

Dashing-Rails - The exceptionally handsome dashboard framework for Rails.

Data Visualization

RailRoady - Ruby on Rails ³⁄₄ model and controller UML class diagram generator.
Rails Erd - Generate Entity-Relationship Diagrams for Rails applications.
Ruby/GraphViz - Ruby interface to the GraphViz graphing tool

Database Drivers

Cassandra Driver - A pure ruby driver for Apache Cassandra with asynchronous io and configurable load balancing, reconnection and retry policies
DataObjects - An attempt to rewrite existing Ruby database drivers to conform to one, standard interface.
mongo-ruby-driver - MongoDB Ruby driver
moped - A MongoDB driver for Ruby
mysql2 - A modern, simple and very fast Mysql library for Ruby (binding to libmysql)
Redic - Lightweight Redis Client
redis-rb - A Ruby client that tries to match Redis’ API one-to-one, while still providing an idiomatic interface
ruby-pg - Ruby interface to PostgreSQL 8.3 and later
SQLite3

Database Tools

Database Cleaner - Database Cleaner is a set of strategies for cleaning your database in Ruby.
PgHero - Postgres insights made easy
Seed dump - Rails 4 task to dump (parts) of your database to db/seeds.rb.
Seed Fu - Advanced seed data handling for Rails.

Date and Time Processing

business_time - Support for doing time math in business hours and days
Chronic - A natural language date/time parser written in pure Ruby
groupdate - The simplest way to group temporal data in ActiveRecord, arrays and hashes
time-lord - Adds extra functionality to the time class
time_diff - Calculates the difference between two time
validates_timeliness - Date and time validation plugin for ActiveModel and Rails
yymmdd - Tiny DSL for idiomatic date parsing and formatting

Debugging Tools

Byebug - A simple to use, feature rich debugger for Ruby 2.
debugger - A port of ruby-debug that works on 1.9.2 and 1.9.3.

Decorators

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

DevOps Tools

Backup - Provides an elegant DSL in Ruby for performing backups on UNIX-like systems
Capistrano - A remote server automation and deployment tool written in Ruby
Chef - A systems integration framework, built to bring the benefits of configuration management to your entire infrastructure
Lita - ChatOps for Ruby: A pluggable chat bot framework usable with any chat service.
Logstash - Logs/event transport, processing, management, search
Mina - Really fast deployer and server automation tool.
Puppet - An automated administrative engine for your Linux, Unix, and Windows systems, performs administrative tasks (such as adding users, installing packages, and updating server configurations) based on a centralized specification
Rubber - The rubber plugin enables relatively complex multi-instance deployments of RubyOnRails applications to Amazon’s Elastic Compute Cloud (EC2).
Vagrant - Create and configure lightweight, reproducible, and portable development environments

Documentation

Asciidoctor - A fast, Ruby-based text processor & publishing toolchain for converting AsciiDoc to HTML5, DocBook, EPUB3, PDF & more.
grape-swagger - Add swagger compliant documentation to your Grape API
Inch - Inch is a documentation measurement and evalutation tool for Ruby code, based on YARD
RDoc - RDoc produces HTML and command-line documentation for Ruby projects
YARD - YARD enables the user to generate consistent, usable documentation that can be exported to a number of formats very easily

E-Commerce and Payments

Active Merchant - A simple payment abstraction library extracted from Shopify
Paypal Merchant SDK - Official Paypal Merchant SDK for Ruby
Piggybak - Modular, Extensible open-source ecommerce solution for Ruby on Rails
ROR Ecommerce
Shoppe - A Rails-based e-commerce platform which allows you to easily introduce a catalogue-based store into your Rails 4 applications
Spree
stripe-ruby - Stripe Ruby bindings

Ebook

Bookshop - Bookshop is a an open-source agile book development and publishing framework for authors, editors.
Eeepub - EeePub is a Ruby ePub generator.
Gepub - A generic EPUB library for Ruby : supports EPUB 3
Git Scribe - Basically the best way to write an ebook.
Mobi - A Ruby way to read MOBI format metadata
Review - Re:VIEW is flexible document format/conversion system

Email

Incoming - Incoming! helps you receive email in your Rack apps
LetterOpener - Preview mail in the browser instead of sending.
Mail - A Really Ruby Mail Library
MailCatcher - Catches mail and serves it through a dream
Mailman - An incoming mail processing microframework in Ruby
Pony - The express way to send mail from Ruby

Environment Management

chgems - Chroot for RubyGems
chruby - Change your current Ruby. No shims, no crazy options or features, ~90 LOC
fry - Simple ruby version manager for fish
gem_home - A tool for changing your $GEM_HOME
rbenv - Use rbenv to pick a Ruby version for your application and guarantee that your development environment matches production
ruby-build - Compile and install Ruby
ruby-install - Installs Ruby, JRuby, Rubinius, MagLev or MRuby
RVM - RVM is a command-line tool which allows you to easily install, manage, and work with multiple ruby environments from interpreters to sets of gems

Error Handling

Airbrake - The official Airbrake library for Ruby on Rails (and other Rack based frameworks)
Better Errors - Better error page for Rack apps
Errbit - The open source, self-hosted error catcher
Exception Notification - A set of notifiers for sending notifications when errors occur in a Rack/Rails application
Nesty - Nested exceptions for Ruby
Raven Ruby - Raven is a Ruby client for Sentry.

File Upload

CarrierWave - Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks
DragonFly - A Ruby gem for on-the-fly processing - suitable for image uploading in Rails, Sinatra and much more!
PaperClip - Easy file attachment management for ActiveRecord
rack-secure-upload - Upload files securely

Form Builder

Abracadabra - The gem that swaps out text with a fully-compliant Rails form in one click
Formtastic - A Rails form builder plugin with semantically rich and accessible markup
Rails Bootstrap Forms - Rails form builder that makes it super easy to create beautiful-looking forms with Twitter Bootstrap 3+
Simple Form - Rails forms made easy

Game Development

Gosu - A 2D game development library for the Ruby and C++ programming languages
Yeah - Practical Ruby video game framework

Geolocation

Geocoder - A complete geocoding solution for Ruby. With Rails it adds geocoding (by street or IP address), reverse geocoding (find street address based on given coordinates), and distance queries
Geokit - Geokit gem provides geocoding and distance/heading calculations

Git Tools

git-auto-bisect - Find the commit that broke master
git-spelunk - Dig through git blame history
git-up - Fetch and rebase all locally-tracked remote branches
git-whence - Find which merge a commit came from
hub - a command line tool that wraps Git in order to extend it with extra features and commands that make working with GitHub easier
Rugged - Ruby bindings to libgit2

GUI

HTML/XML Parsing

HappyMapper - Object to XML mapping library, using Nokogiri
Nokogiri - An HTML, XML, SAX, and Reader parser with XPath and CSS selector support
ROXML - Custom mapping and bidirectional marshalling between Ruby and XML using annotation-style class methods, via Nokogiri or LibXML.

HTTP

excon - Usable, fast, simple Ruby HTTP 1.1. It works great as a general HTTP(s) client and is particularly well suited to usage in API clients.
Faraday
Http Client - Gives something like the functionality of libwww-perl (LWP) in Ruby
http - The HTTP Gem: a simple Ruby DSL for making HTTP requests.
httparty
Patron - Patron is a Ruby HTTP client library based on libcurl.
RESTClient - Simple HTTP and REST client for Ruby, inspired by microframework syntax for specifying actions
Savon - Savon is a SOAP client for the Ruby programming language.
Sawyer - Secret user agent of HTTP, built on top of Faraday
Typhoeus - Typhoeus wraps libcurl in order to make fast and reliable requests

Imagery

MiniMagick - A ruby wrapper for ImageMagick or GraphicsMagick command line
PSD.rb - Parse Photoshop files in Ruby with ease
RMagick - RMagick is an interface between Ruby and ImageMagick
Skeptick - Skeptick is an all-purpose DSL for building and running ImageMagick commands.

Internationalization

i18n-tasks - Manage missing and unused translations with the awesome power of static analysis
i18n - Ruby Internationalization and localization solution
r18n - Advanced i18n library for Rails, Sinatra, desktop apps, models, works well with complex languages like Russian.
twitter-cldr-rb - Ruby implementation of the ICU (International Components for Unicode) that uses the Common Locale Data Repository to format dates, plurals, and more

Logging

Cabin - Structured+contextual logging experiments in Ruby.
Fluentd - Fluentd collects events from various data sources and writes them to files, database or other types of storages
HttpLog - Log outgoing HTTP requests.
Log4r - Log4r is a comprehensive and flexible logging library for use in Ruby programs
Logging - A flexible logging library for use in Ruby programs based on the design of Java’s log4j library.
Lograge - An attempt to tame Rails’ default policy to log everything.
MongoDB Logger - MongoDB logger for Rails
Scrolls - Simple logging
Yell - Your Extensible Logging Library

Machine Learning

PredictionIO Ruby SDK - The PredictionIO Ruby SDK provides a convenient API to quickly record your users’ behavior and retrieve personalized predictions for them
Ruby Datumbox Wrapper - It’s a simple Ruby Datumbox Wrapper. At the moment the API currently allows you to build applications that make use of machine learning algorithms.

Markdown Processors

kramdown - Kramdown is yet-another-markdown-parser but fast, pure Ruby, using a strict syntax definition and supporting several common extensions
Maruku - A pure-Ruby Markdown-superset interpreter
Redcarpet - A fast, safe and extensible Markdown to (X)HTML parser

Misc

AASM - A library for adding finite state machines to Ruby classes
AXLSX - An excel xlsx generation library
Betty - Friendly English-like interface for your command line. Don’t remember a command? Ask Betty
Foreman - Manage Procfile-based applications
Gollum - A simple, Git-powered wiki with a sweet API and local frontend.
Guard - A command line tool to easily handle events on file system modifications
JsonCompare - Returns the difference between two JSON files
play ► - Your company’s dj
Pry Debugger - Pry navigation commands via debugger (formerly ruby-debug)
Pry - A powerful alternative to the standard IRB shell for Ruby
pygments.rb - A Ruby wrapper for the Python pygments syntax highlighter
Ruby Operators - A webpage showing awesome names for different Ruby operators.
Termit - Google Translate with speech synthesis in your terminal
Treetop - PEG (Parsing Expression Grammar) parser
Yomu - Read text and metadata from files and documents (.doc, .docx, .pages, .odt, .rtf, .pdf)

Mobile Development

Ruboto - A platform for developing full stand-alone apps for Android using the Ruby language and libraries
RubyMotion - A revolutionary toolchain that lets you quickly develop and test native iOS and OS X applications for iPhone, iPad and Mac

Money

eu_central_bank - A gem that calculates the exchange rate using published rates from European Central Bank
Money - A Ruby Library for dealing with money and currency conversion

Natural Language Processing

Treat - Treat is a toolkit for natural language processing and computational linguistics in Ruby

ORM/ODM

ActiveRecord
DataMapper - ORM which works well with legacy databases. Last release (1.2.0) was on 13 October 2011.
Guacamole - An ODM for ArangoDB
Mongoid - An ODM (Object-Document-Mapper) framework for MongoDB in Ruby
MongoMapper
MongoModel - Ruby ODM for interfacing with MongoDB databases
ohm - Object-hash mapping library for Redis
Sequel - Sequel is a simple, flexible, and powerful SQL database access toolkit for Ruby

ORM/ODM Extensions

Mongoid Tree - A tree structure for Mongoid documents using the materialized path pattern

Package Management

Gems
- Bundler - Manage your application’s gem dependencies with less pain
- RubyGems - Community’s gem hosting service
Packages and Applications
- Berkshelf - A Chef Cookbook manager
- CocoaPods - The Objective-C dependency manager
- fpm - Effing package management! Build packages for multiple platforms (deb, rpm, etc) with great ease and sanity
- Homebrew-cask - a CLI workflow for the administration of Mac applications distributed as binaries
- Homebrew - The missing package manager for OS X

Pagination

Kaminari - A Scope & Engine based, clean, powerful, customizable and sophisticated paginator for modern web app frameworks and ORMs
will_paginate - A pagination library that integrates with Ruby on Rails, Sinatra, Merb, DataMapper and Sequel

PDF

Gimli - Utility for converting markup files to pdf files.
Kitabu - A framework for creating e-books from Markdown/Textile text markup using Ruby.
Pdfkit - HTML+CSS to PDF using wkhtmltopdf
Prawn - Fast, Nimble PDF Writer for Ruby
RGhost - RGhost is a document creation and conversion API.
Shrimp - A phantomjs based pdf renderer
Wicked Pdf - PDF generator (from HTML) plugin for Ruby on Rails
Wisepdf - Wkhtmltopdf wrapper done right

Process Monitoring

Bluepill - Simple process monitoring tool
God - An easy to configure, easy to extend monitoring framework written in Ruby

Processes and Threads

Parallel - Run any code in parallel Processes (> use all CPUs) or Threads (> speedup blocking operations). Best suited for map-reduce or e.g. parallel downloads/uploads
childprocess - Cross-platform ruby library for managing child processes.
forkoff - brain-dead simple parallel processing for ruby
posix-spawn - Fast Process::spawn for Rubys >= 1.8.7 based on the posix_spawn() system interfaces

Profiler

bullet - Help to kill N+1 queries and unused eager loading
Peek - Visual status bar showing Rails performance
perftools.rb - gperftools (formerly known as google-perftools) for Ruby code
rack-mini-profiler - Profiler for your development and production Ruby rack apps
ruby-prof - A code profiler for MRI rubies

Queue

active_job - Declare job classes that can be run by a variety of queueing backends
Delayed::Job - Database backed asynchronous priority queue
Resque - A Redis-backed Ruby library for creating background jobs
Sidekiq - A full-featured background processing framework for Ruby. It aims to be simple to integrate with any modern Rails application and much higher performance than other existing solutions.
Sucker Punch - A single process background processing library using Celluloid. Aimed to be Sidekiq’s little brother.

Robotics

Artoo - Next generation robotics framework with support for different platforms: Arduino, Leap Motion, Pebble, Raspberry Pi, etc.

RSS

Feed normalizer - Extensible Ruby wrapper for Atom and RSS parsers.
Feedjira - A feed fetching and parsing library.
Ratom - A fast, libxml based, Ruby Atom library.
Simple rss - A simple, flexible, extensible, and liberal RSS and Atom reader.

Scheduling

Clockwork - Clockwork is a cron replacement. It runs as a lightweight, long-running Ruby process which sits alongside your web processes (Mongrel/Thin) and your worker processes (DJ/Resque/Minion/Stalker) to schedule recurring work at particular times or dates.
resque-scheduler - A light-weight job scheduling system built on top of Resque
rufus-scheduler - Job scheduler for Ruby (at, cron, in and every jobs)
Whenever - A Ruby gem that provides a clear syntax for writing and deploying cron jobs

Search

attr_searchable - Search engine like fulltext query support for ActiveRecord
elasticsearch-ruby
has_scope - Has scope allows you to easily create controller filters based on your resources named scopes.
pg_search - Builds ActiveRecord named scopes that take advantage of PostgreSQL’s full text search
ransack - Object-based searching.
Rroonga - The Ruby bindings of Groonga
Searchkick - Searchkick learns what your users are looking for. As more people search, it gets smarter and the results get better. It’s friendly for developers - and magical for your users.
Searchlogic - Object based searching, common named scopes, and other useful named scope tools for ActiveRecord
Sunspot - A Ruby library for expressive, powerful interaction with the Solr search engine
Thinking Sphinx - A library for connecting ActiveRecord to the Sphinx full-text search tool

SEO

FriendlyId - The “Swiss Army bulldozer” of slugging and permalink plugins for Active Record
MetaTags - A gem to make your Rails application SEO-friendly
SitemapGenerator - A framework-agnostic XML Sitemap generator written in Ruby

Social Networking

Campo - Campo is a lightweight forum application, base on Ruby on Rails.
diaspora* - A privacy aware, distributed, open source social network
Discourse - A platform for community discussion. Free, open, simple
Forem - Rails 3 and Rails 4 forum engine

State Machines

AASM - State machines for Ruby classes (plain Ruby, Rails Active Record, Mongoid)
simple_states - A super-slim statemachine-like support library
Statesman - A statesmanlike state machine library
Workflow - A finite-state-machine-inspired API for modeling and interacting with what we tend to refer to as ‘workflow’

Static Site Generation

High Voltage - Easily include static pages in your Rails app
Jekyll - Transform your plain text into static websites and blogs
Middleman - A static site generator using all the shortcuts and tools in modern web development
Nanoc - A static site generator, fit for building anything from a small personal blog to a large corporate web site

Template Engine

Curly - A template language that completely separates structure and logic
Haml - HTML Abstraction Markup Language
Liquid - Safe, customer facing template language for flexible web apps
Mustache - Logic-less Ruby templates
Slim - A template language whose goal is reduce the syntax to the essential parts without becoming cryptic
Tilt - Generic interface to multiple Ruby template engines

Testing

Frameworks
- RSpec - Behaviour Driven Development for Ruby
- Formatters
  - Emoji-RSpec - Custom Emoji Formatters for RSpec
  - Fuubar - The instafailing RSpec progress bar formatter
  - Nyan Cat - Nyan Cat inspired RSpec formatter!
- Bacon - A small RSpec clone
- Capybara - Acceptance test framework for web applications
- Cucumber - BDD that talks to domain experts first and code second
- Cutest - Isolated tests in Ruby
- Konacha - Test your Rails application’s JavaScript with the mocha test framework and chai assertion library
- minitest - minitest provides a complete suite of testing facilities supporting TDD, BDD, mocking, and benchmarking
- RR - A test double framework that features a rich selection of double techniques and a terse syntax
- shoulda-matchers - Provides Test::Unit- and RSpec-compatible one-liners that test common Rails functionality. These tests would otherwise be much longer, more complex, and error-prone.
- Spinach - Spinach is a high-level BDD framework that leverages the expressive Gherkin language (used by Cucumber) to help you define executable specifications of your application or library’s acceptance criteria.
- Spork - A DRb server for testing frameworks (RSpec / Cucumber currently)
- Test::Unit - Test::Unit is a xUnit family unit testing framework for Ruby
Fake Data
- Fabrication - A simple and powerful object generation library
- factory_girl - A library for setting up Ruby objects as test data
- faker - A library for generating fake data such as names, addresses, and phone numbers.
- ffaker - A faster Faker, generates dummy data, rewrite of faker.
- Forgery - Easy and customizable generation of forged data.
- Machinist - Fixtures aren’t fun. Machinist is
Mock
- ActiveMocker - Generate mocks from ActiveRecord models for unit tests that run fast because they don’t need to load Rails or a database.
- TestXml - TestXml is a small extension for testing XML/HTML.
- WebMock - Library for stubbing and setting expectations on HTTP requests
WebDrivers
- Selenium WebDriver - This gem provides Ruby bindings for WebDriver.
- Watir - Web application testing in Ruby
Extra
- Appraisal - Appraisal integrates with bundler and rake to test your library against different versions of dependencies
- Ruby-JMeter - A Ruby based DSL for building JMeter test plans
- Spring - Preloads your rails environment in the background for faster testing and Rake tasks
- timecop - Provides “time travel” and “time freezing” capabilities, making it dead simple to test time-dependent code
- vcr - Record your test suite’s HTTP interactions and replay them during future test runs for fast, deterministic, accurate tests

Third-party APIs

databasedotcom - Ruby client for the Salesforce’s Database.com and Chatter APIs
Dropbox - Dropbox API Ruby Client.
facy - Command line power tool for facebook
fb_graph - A full-stack Facebook Graph API wrapper
flickr - A Ruby interface to the Flickr API
gitlab - Ruby wrapper and CLI for the GitLab API
gmail - A Rubyesque interface to Gmail, with all the tools you’ll need.
hipchat-rb - HipChat HTTP API Wrapper in Ruby with Capistrano hooks
instagram-ruby-gem - The official gem for the Instagram REST and Search APIs
itunes_store_transporter - Ruby wrapper around Apple’s iTMSTransporter program
linkedin - Provides an easy-to-use wrapper for LinkedIn’s REST APIs
Octokit - Ruby toolkit for the GitHub API
Pusher - Ruby server library for the Pusher API.
ruby-gmail - A Rubyesque interface to Gmail
ruby-trello - Implementation of the Trello API for Ruby
soundcloud-ruby - Official SoundCloud API Wrapper for Ruby
t - A command-line power tool for Twitter
tweetstream - A simple library for consuming Twitter’s Streaming API
twitter - A Ruby interface to the Twitter API
wikipedia - Ruby client for the Wikipedia API.
youtube_it - An object-oriented Ruby wrapper for the YouTube GData API
Yt - An object-oriented Ruby client for YouTube API V3

Video

Streamio FFMPEG - Simple yet powerful wrapper around the ffmpeg command for reading metadata and transcoding movies

Web Crawling

anemone - Ruby library and CLI for crawling websites.
LinkThumbnailer - Ruby gem that generates thumbnail images and videos from a given URL. Much like popular social website with link preview.
Mechanize - Mechanize is a ruby library that makes automated web interaction easy.
MetaInspector - Ruby gem for web scraping purposes. It scrapes a given URL, and returns you its title, meta description, meta keywords, an array with all the links, all the images in it, etc.
Upton - A batteries-included framework for easy web-scraping. Just add CSS! (Or do more.)
Wombat - Web scraper with an elegant DSL that parses structured data from web pages

Web Frameworks

Camping - A web microframework which consistently stays at less than 4kB of code
Cuba - A microframework for web development
Lotus - It aims to bring back Object Oriented Programming to web development, leveraging on a stable API, a minimal DSL, and plain objects.
Padrino - A full-stack ruby framework built upon Sinatra
Pakyow - A framework for building modern web-apps in Ruby. It helps you build working software faster with a development process that remains friendly to both designers and developers
Ramaze - A simple, light and modular open-source web application framework written in Ruby
Roda - A routing tree web framework
Ruby on Rails - A web-application framework that includes everything needed to create database-backed web applications according to the Model-View-Controller (MVC) pattern
Sinatra - Classy web-development dressed in a DSL
Volt - A Ruby web framework where your ruby code runs on both the server and the client

Web Servers

Goliath - A non-blocking Ruby web server framework
Phusion Passenger - Fast and robust web server and application server
Puma - A modern, concurrent web server for Ruby
Rack - A common Ruby web server interface. By itself, it’s just a specification and utility library, but all Ruby web servers implement this interface
Thin - Tiny, fast & funny HTTP server
Unicorn - Rack HTTP server for fast clients and Unix

WebSocket

Faye - A set of tools for simple publish-subscribe messaging between web clients. It ships with easy-to-use message routing servers for Node.js and Rack applications, and clients that can be used on the server and in the browser.
Firehose - Build realtime Ruby web applications
Rails Realtime - Adding Real-Time To Your RESTful Rails App.
Sync - Real-time Rails Partials
Websocket-Rails - Creates a built in WebSocket server inside a Rails application with ease. Also support streaming HTTP

Services and Apps

AppSignal - Better monitoring for your Rails applications.
CodeClimate - Quality & security analysis for Ruby on Rails and Javascript.
Gemnasium - Monitor your project dependencies and alert you about updates and security vulnerabilities.
GitHub - Powerful collaboration, code review, and code management for open source and private projects.
Gitlab CI - Integrate with your GitLab to run tests for your projects.
GitLab - Open source software to collaborate on code.
Hakiri - Ship Secure Ruby Apps.
Honeybadger - Exception, uptime, and performance monitoring for Ruby.
HoundCI - Review your Ruby code for style guide violations.
Inch CI - Documentation badges for Ruby projects.
Omniref - A comprehensive Ruby documentation site
PullReview - Automated code review for Ruby and Rails - from style to security.
Travis CI.com - Take care of running your tests and deploying your private apps.
Travis CI.org - A distributed build system for the open source community.

Resources

GemBundle - A place to discover new Ruby Gems
GitHub Explore
Practicing Ruby - Delightful lessons for dedicated programmers
Ruby Weekly - A free, once–weekly e-mail round-up of Ruby news and articles
Ruby5 - The latest news in the Ruby and Rails community
RubyDaily - Community driven news
RubyFlow - Ruby Programming Community Link Blog
The Ruby Toolbox - A comprehensive catalog of Ruby and Rails plug-ins, gems, tools and resources for Ruby developers with popularity ratings based on GitHub watchers and Gem downloads

Other Awesome Lists

Other amazingly awesome lists can be found in the awesome-awesomeness list.

awesome-ruby