Skip to content
Oeiuwq Faith Blog OpenSource Porfolio

sdogruyol/awesome-ruby

A curated list of awesome Ruby frameworks, libraries and resources. Inspired by awesome-php & awesome-python.

sdogruyol/awesome-ruby.json
{
"createdAt": "2014-07-03T10:31:05Z",
"defaultBranch": "master",
"description": "A curated list of awesome Ruby frameworks, libraries and resources. Inspired by awesome-php & awesome-python.",
"fullName": "sdogruyol/awesome-ruby",
"homepage": null,
"language": null,
"name": "awesome-ruby",
"pushedAt": "2024-08-15T08:02:23Z",
"stargazersCount": 1266,
"topics": [],
"updatedAt": "2026-07-07T19:21:53Z",
"url": "https://github.com/sdogruyol/awesome-ruby"
}
  • Cells - View Components for Rails.
  • Komponent - An opinionated way of organizing front-end code in Rails, based on components.
  • Phlex - A framework for building object-oriented views in Ruby.
  • ViewComponent - View components for Rails.
  • active_link_to - View helper to manage “active” state of a link.
  • auto_html - Rails extension for transforming URLs to appropriate resource (image, link, YouTube, Vimeo video…).
  • Bh - Bootstrap Helpers for Ruby.
  • gon - If you need to send some data to your js files and you don’t want to do this with long way through views and parsing - use gon.
  • PluggableJs - Page-specific javascript for Rails applications with the ability of passing data from a controller.
  • render_async - Render partials to your views asynchronously and increase load performance of your pages.
  • LinkThumbnailer - Ruby gem that generates thumbnail images and videos from a given URL. Much like popular social website with link preview.
  • Kimurai - A modern web scraping framework written in Ruby which works out of box with Headless Chromium/Firefox, PhantomJS, or simple HTTP requests and allows to scrape and interact with JavaScript rendered websites.
  • Mechanize - Mechanize is a ruby library that makes automated web interaction easy.
  • MetaInspector - Ruby gem for web scraping purposes.
  • Spidr - A versatile Ruby web spidering library that can spider a site, multiple domains, certain links or infinitely. Spidr is designed to be fast and easy to use.
  • Upton - A batteries-included framework for easy web-scraping.
  • Wombat - Web scraper with an elegant DSL that parses structured data from web pages.
  • Camping - A web microframework which consistently stays at less than 4kB of code.
  • Cuba - A microframework for web development.
  • Hobbit - A minimalistic microframework built on top of Rack.
  • Hanami - It aims to bring back Object Oriented Programming to web development, leveraging on a stable API, a minimal DSL, and plain objects.
  • Hyperstack - A Complete Isomorphic Ruby Framework using React and Opal.
  • Padrino - A full-stack ruby framework built upon Sinatra.
  • Rack::App - Bare bone minimalistic framework for building rack apps.
  • 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.
  • Scorched - Light-weight, inheritable and composable web framework, inspired by Sinatra.
  • Sinatra - Classy web-development dressed in a DSL.
  • Syro - Simple router for web applications.
  • Trailblazer - Trailblazer is a thin layer on top of Rails. It gently enforces encapsulation, an intuitive code structure and gives you an object-oriented architecture.
  • Agoo - A high performance HTTP server for Ruby that includes GraphQL and WebSocket support.
  • Falcon - A high-performance web server for Ruby, supporting HTTP/1, HTTP/2 and TLS.
  • Iodine - An non-blocking HTTP and Websocket web server optimized for Linux/BDS/macOS and Ruby MRI.
  • 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.
  • AnyCable – Polyglot replacement for Ruby WebSocket servers with Action Cable protocol.
  • CableReady - CableReady completes the ActionCable story and expands the utility of web sockets in your Rails app.
  • Faye - A set of tools for simple publish-subscribe messaging between web clients.
  • Firehose - Build realtime Ruby web applications.
  • StimulusReflex - Build reactive applications with the Rails tooling you already know and love.

A curated list of awesome Ruby frameworks, libraries and resources. Inspired by awesome-php & awesome-python.

Your Pull requests are welcome! Let’s make this the awesomest resource for Ruby :purple_heart:

Resources
- [Awesome Ruby]!(#awesome-ruby)- [Admin Panels]!(#admin-panels)- [Anti-spam]!(#anti-spam)
- [Asset Management]!(#asset-management)- [Audio]!(#audio)- [Auditing]!(#auditing)
- [Authentication and OAuth]!(#authentication-and-oauth)- [Build Tools]!(#build-tools)- [Caching]!(#caching)
- [Cloud Services]!(#cloud-services)- [CMS]!(#cms)- [Code Analysis and Linter]!(#code-analysis-and-linter)
- [Command-line Tools]!(#command-line-tools)- [Configuration]!(#configuration)- [CSS and Styling]!(#css-and-styling)
- [Data Validation]!(#data-validation)- [Data Visualization]!(#data-visualization)- [Database Drivers]!(#database-drivers)
- [Date and Time]!(#date-and-time)- [Debugging Tools]!(#debugging-tools)- [DevOps Tools]!(#devops-tools)
- [Distribution]!(#distribution)- [Documentation]!(#documentation)- [Downloader]!(#downloader)
- [E-Commerce & Online Paying]!(#e-commerce—online-paying)- [E-Mail]!(#e-mail)- [Environment Management]!(#environment-management)
- [File Uploading]!(#file-uploading)- [Feature Flipping]!(#feature-flipping)- [Foreign Function Interface]!(#foreign-function-interface)
- [Forms]!(#forms)- [Game Development]!(#game-development)- [Geolocation]!(#geolocation)
- [GUI]!(#gui)- [High Performance]!(#high-performance)- [HTML/XML/CSS Manipulation]!(#htmlxmlcss-manipulation)
- [HTTP]!(#http)- [Imagery]!(#imagery)- [Internationalization]!(#internationalization)
- [Logging]!(#logging)- [Machine Learning]!(#machine-learning)- [MapReduce]!(#mapreduce)
- [Multi-tenancy]!(#multi-tenancy)- [Natural Language Processing]!(#natural-language-processing)- [Networking]!(#networking)
- [ORM]!(#orm)- [Package Management]!(#package-management)- [Presentation Tools]!(#presentation-tools)
- [Processes and Threads]!(#processes-and-threads)- [Push Notification]!(#push-notification)- [Queue]!(#queue)
- [Serverless]!(#serverless)- [Spreadsheets]!(#spreadsheets)- [RESTful API]!(#restful-api)
- [Science and Data Analysis]!(#science-and-data-analysis)- [Search]!(#search)- [Site Monitoring]!(#site-monitoring)
- [Starter Apps]!(#starter-apps)- [Tagging]!(#tagging)- [Template Engine]!(#template-engine)
- [Testing]!(#testing)- [Text Processing]!(#text-processing)- [Third-party APIs]!(#third-party-apis)
- [URL Manipulation]!(#url-manipulation)- [Video]!(#video)- [Web Content Extracting]!(#web-content-extracting)
- [Web Crawling]!(#web-crawling)- [Web Frameworks]!(#web-frameworks)- [Web Servers]!(#web-servers)
- [WebSocket]!(#websocket)- [Miscellaneous]!(#miscellaneous)- [Editor Plugins]!(#editor-plugins)
- [Resources]!(#resources)- [People to Follow]!(#people-to-follow)- [Other Awesome Lists]!(#other-awesome-lists)
- [Contributing]!(#contributing)

Libraries for administrative interfaces.

  • active_admin The administration framework for Ruby on Rails applications
  • rails_admin A Rails engine that provides an easy-to-use interface for managing your data
  • administrate A framework for creating flexible, powerful admin dashboards in Rails.

Libraries for fighting spam.

Tools for managing, compressing and minifying website assets.

  • sprockets Rack-based asset packaging system
  • rails-assets is the frictionless proxy between Bundler and Bower
  • seal A C library (with Ruby binding) for 3D audio rendering

Tools for logging changes to ActiveRecord models

  • Audited - Audited (formerly acts_as_audited) is an ORM extension that logs all changes to your Rails models.
  • Logidze - Logs model changes via database triggers (PL/SQL functions). Fastest model diffs. PostgreSQL 9.5+ only.

Libraries for implementing authentications schemes.

  • Devise - Devise is a flexible authentication solution for Rails based on Warden
  • Omniauth - OmniAuth is a flexible authentication system utilizing Rack middleware
  • Warden - General Rack Authentication Framework
  • AuthLogic - A simple ruby authentication solution
  • Sorcery - Magical authentication for Rails 3 & 4
  • CanCanCan Authorization gem for Rails (continued version of CanCan from ryanb)
  • pundit - Minimal authorization using object oriented design.
  • authority - ORM neutral authorization.
  • doorkeeper An OAuth 2 provider for Rails
  • tiddle - Devise strategy for token authentication in API-only Ruby on Rails applications

Compile software from source code.

  • teapot A decentralised build tool for managing complex cross-platform projects

Libraries for caching data.

  • rack-cache HTTP Caching for Ruby Web Apps
  • Dalli - a high performance pure Ruby client for accessing memcached servers.
  • fog The Ruby cloud services library
  • aws-sdk-ruby The official AWS SDK for Ruby

Content management systems

  • Refinery CMS An extendable Ruby on Rails CMS that supports Rails 3.2 and 4.2
  • Comfortable Mexican Sofa A powerful Rails 4/5 CMS Engine
  • Browser Humane Content Management for Rails
  • Locomotive a brand new CMS system with super sexy UI and cool features
  • Radiant A no-fluff, open source content management system
  • Nesta A lightweight CMS, implemented in Sinatra
  • alchemy_cms the most powerful, user friendly and flexible Rails CMS
  • weby Newbie CMS in Ruby on Rails

Libraries and tools for analyzing, parsing and manipulation codebases.

  • sonarlint-intellij - An IDE extension that helps you detect and fix quality issues as you write code.
  • Rubocop - A Ruby static code analyzer, based on the community Ruby style guide.
  • ruby-lint - ruby-lint is a static code analysis tool for Ruby
  • brakeman - Static analysis tool which checks Ruby on Rails applications for security vulnerabilities
  • reek - Code smell detector for Ruby
  • Breezer - Lock your Gemfile dependencies to safe versions.

Libraries for building command-line application.

  • Commander - The complete solution for Ruby command-line executables
  • Thor - Thor is a toolkit for building powerful command-line interfaces

Libraries for storing configuration options.

Libraries for validating data. Used for forms in many cases.

  • kangal - Extended validation gem for email, subdomain, credit card, tax number etc
  • bin_checker - BIN validator for Turkish Banks

Libraries for visualizing data.

  • prosperity The easiest way to graph data from your Rails models

Libraries for connecting and operating databases.

  • Relational Databases

    • ruby-pg Ruby interface to the PostgreSQL >= 8.4
    • mysql2 A modern, simple and very fast Mysql library for Ruby
    • sqlite3-ruby Ruby bindings for the SQLite3 embedded database
  • NoSQL Databases

Libraries for working with dates and times.

  • stamp Date and time formatting for humans
  • chronic Natural language date/time parser

Libraries for debugging and developing.

Software and libraries for DevOps.

  • Puppet - Server automation framework and application
  • Chef - A systems integration framework, built to bring the benefits of configuration management to your entire infrastructure.
  • Vagrant - Vagrant is a tool for building and distributing development environments.
  • Capistrano - Remote multi-server automation tool
  • Mina Really fast deployer and server automation tool
  • Nanobox - A micro-PaaS (μPaaS) for creating consistent, isolated, Ruby environments deployable anywhere https://nanobox.io.

Libraries to create packaged executables for release distribution.

  • fpm Building packages for multiple platforms (deb, rpm, etc) with great ease and sanity.

Libraries for generating project documentation.

  • Dictum - A tool that let’s you create automatic documentation of your Rails API endpoints through your tests.
  • rdoc HTML and online documentation for Ruby projects
  • yard A Ruby Documentation tool

Libraries for downloading.

  • Active Merchant - A simple payment abstraction library extracted from Shopify.
  • Spree - A complete open source e-commerce solution for Ruby on Rails.
  • Square SDK - Use this gem to integrate Square payments into your app and grow your business with Square APIs including Catalog, Customers, Employees, Inventory, Labor, Locations, and Orders.
  • PayPal Merchant SDK - Provides Ruby APIs for processing payments, recurring payments, subscriptions and transactions using PayPal’s Merchant APIs.

Libraries for sending and parsing email.

  • mail A Really Ruby Mail Library
  • mailman An incoming mail processing microframework in Ruby

Libraries for Ruby version and environment management.

  • chruby - Changes the current Ruby
  • chgems - Chroot for RubyGems
  • rvm - Ruby Version Manager
  • rbenv - Groom your app’s Ruby environment
  • ruby-install - Installs Ruby, JRuby, Rubinius, MagLev or MRuby
  • ruby-build - Compile and install Ruby
  • Nanobox - A tool for creating isolated Ruby environments for consistency across teams and application stages (dev, staging, production, etc.) https://nanobox.io.

Libraries for exception and error handling.

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

Libraries for handling file uploads.

Libraries for flipping features

  • abstract_feature_branch a gem that enables developers to easily branch by abstraction
  • helioth Manage feature flipping and rollout
  • flipper feature flipping for ANYTHING
  • flip Flip lets you declare and manage feature flags, backed by cookies (private testing) and database (site-wide)
  • rollout Feature flippers.

Libraries for providing foreign function interface.

Libraries for working with forms.

  • simple_form Forms made easy for Rails
  • formtastic A Rails form builder plugin with semantically rich and accessible markup
  • bootstrap_form A Rails form builder that makes it super easy to integrate Bootstrap v4-style forms into your Rails application

Awesome game development libraries.

  • Gosu - A 2D game development library for the Ruby and C++ programming languages

Libraries for geocoding addresses and working with latitudes and longitudes.

  • geocoder Complete Ruby geocoding solution
  • Geokit - Geokit gem provides geocoding and distance/heading calculations.

Libraries for working with Git VCS

  • katip - Change logger for Git initialized projects

Libraries for working with graphical user interface applications.

  • glimmer Ruby Desktop Development GUI Library
  • shoes A tiny graphical app kit for ruby
  • shoes4 the next version of Shoes

Libraries for making Ruby faster.

  • EventMachine - EventMachine: fast, simple event-processing library for Ruby programs
  • Celluloid - Actor-based concurrent object framework for Ruby. It has its own awesomeness.

Libraries for working with HTML, XML & CSS.

  • Nokogiri
  • loofah A general library for manipulating and transforming HTML/XML documents and fragments

Libraries for working with HTTP.

  • httparty Makes http fun again!
  • faraday Simple, but flexible HTTP client library, with support for multiple backends.
  • http A simple Ruby DSL for making HTTP requests
  • excon Usable, fast, simple HTTP(S) 1.1 for Ruby
  • nestful Simple Ruby HTTP/REST client with a sane API
  • response_code Response Code in readable way

Libraries for manipulating images.

  • rmagick An interface to the ImageMagick and GraphicsMagick image processing libraries
  • chunky_png Read/write access to PNG images in pure Ruby
  • image_optim Optimize images using multiple utilities
  • magickly image manipulation as a (plugin-able) service

Libraries for woking with i18n.

  • i18n - Basic internationalization(i18n) library for Ruby
  • globalize Rails I18n de-facto standard library for ActiveRecord model/data translation
  • i18n-tasks Manage translations in ruby applications with the awesome power of static analysis

Libraries for generating and working with log files.

  • Logstash Logstash is a tool for managing events and logs.

Libraries for 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
  • m2cgen - A CLI tool to transpile trained classic ML models into a native Ruby code with zero dependencies.

Frameworks and libraries for MapReduce.

Libraries for managing multi-tenant apps.

  • Apartment - Database multi-tenancy for Rack (and Rails) applications

Libraries for working with human languages.

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

Libraries for network programming.

Libraries that implement Object-Relational Mapping or data mapping techniques.

  • Relational Databases

    • ActiveRecord - Databases on Rails. Build a persistent domain model by mapping database tables to Ruby classes
    • DataMapper - DataMapper is an Object Relational Mapper written in Ruby. The goal is to create an ORM which is fast, thread-safe and feature rich.
    • Sequel - The Database Toolkit for Ruby
  • NoSQL Databases

    • Mongoid - Mongoid (pronounced mann-goyd) is an Object-Document-Mapper (ODM) for MongoDB written in Ruby.
    • Ohm - Object-Hash Mapping for Redis

Libraries for package and dependency management.

  • RubyGems - RubyGems is a package manager for the Ruby programming language that provides a standard format for distributing Ruby programs and libraries
  • Bundler - Bundler provides a consistent environment for Ruby projects by tracking and installing the exact gems and versions that are needed
  • Homebrew - Homebrew installs the stuff you need that Apple didn’t
  • Homebrew Cask - Cask provides a friendly homebrew-style CLI workflow for the administration of Mac applications distributed as binaries
  • kaminari A Scope & Engine based, clean, powerful, customizable and sophisticated paginator
  • will_paginate Pagination library for Rails 3, Sinatra, Merb, DataMapper, and more
  • order_query Keyset pagination to find the next or previous record(s) relative to the current one efficiently, e.g. for infinite scroll.
  • DocRaptor Wrapper library for DocRaptor’s Ruby-based HTML-to-PDF API
  • wicked_pdf PDF generator (from HTML) plugin for Ruby on Rails
  • pdfkit HTML+CSS to PDF using wkhtmltopdf
  • prawn Fast, Nimble PDF Writer for Ruby
  • InvoicePrinter - Super simple PDF invoicing in Ruby (built on top of Prawn).
  • rabbit A programable presentaton tool by Ruby
  • reveal-ck Reveal.js presentations with a Ruby toolset

Libraries for woking with processes or threads

  • Parallel - Ruby parallel processing made simple and fast
  • bullet - help to kill N+1 queries and unused eager loading
  • Rpush - The push notification service for Ruby.
  • apn_sender - Background worker to send Apple Push Notifications over a persistent TCP socket.
  • Houston - A simple gem for sending Apple Push Notifications.
  • webpush - Encryption Utilities for Web Push protocol

Libraries for working with event and task queues.

  • Resque A Redis-backed Ruby library for creating background jobs, placing them on multiple queues.
  • Delayed::Job — Database backed asynchronous priority queue.
  • Qu A Ruby library for queuing and processing background jobs.
  • Sidekiq Simple, efficient background processing for Ruby

Libraries for developing RESTful APIs.

  • Grape - An opinionated micro-framework for creating REST-like APIs in Ruby.
  • Rails::API - Rails for API only applications
  • jbuilder - Create JSON structures via a Builder-style DSL
  • rabl - General Ruby templating with json, bson, xml, plist and msgpack support
  • active_model_serializers - ActiveModel::Serializer implementation and Rails hooks
  • oat - Adapters-based API serializers with Hypermedia support for Ruby apps (HAL, Siren, JSONAPI).
  • APIcasso - An abstract API design as a Rails-based mountable engine. RESTfullize your legacy code.
  • FaaStRuby - Serverless Software Development Platform for Ruby and Crystal developers.

Libraries for manipulating Excel, Google Spreadsheets, Numbers, OpenOffice and LibreOffice files

  • spreadsheet - The Spreadsheet Library is designed to read and write Spreadsheet Documents.
  • caxlsx - Caxlsx excels at helping you generate beautiful Office Open XML Spreadsheet documents.
  • caxlsx_rails - Axlsx-Rails provides an Axlsx renderer so you can move all your spreadsheet code from your controller into view files.
  • roo - Roo implements read access for all spreadsheet types and read/write access for Google spreadsheets.
  • google-spreadsheet-ruby - This is a library to read/write Google Spreadsheet.
  • rubyXL - rubyXL is a gem which allows the parsing, creation, and manipulation of Microsoft Excel (.xlsx/.xlsm) Documents
  • Odf-report - Generates ODF files, given a template (.odt) and data, replacing tags
  • simple_xlsx_writer - Just as the name says, simple writter for Office 2007+ Excel files
  • remote_table - Open local or remote XLSX, XLS, ODS, CSV (comma separated), TSV (tab separated), other delimited, fixed-width files, and Google Docs.
  • acts_as_caxlsx - acts_as_caxlsx lets you turn any ActiveRecord::Base inheriting class into an excel spreadsheet.
  • activeadmin-caxlsx - This gem uses caxlsx to provide excel/xlsx downloads for resources in Active Admin.
  • to_spreadsheet - Render XLSX from Rails using existing views
  • write_xlsx - write_xlsx is a gem to create a new file in the Excel 2007+ XLSX format.
  • excel_rails - Allows you to program spreadsheets using .rxls views
  • sheets - Work with spreadsheets easily in a native ruby format.
  • workbook - Workbook contains workbooks, as in a table, contains rows, contains cells, reads/writes excel, ods and csv and tab separated files…
  • Spreadsheet report - Simple tool for running queries against ActiveRecord and putting them into a Google Spreadsheet.
  • oxcelix - A fast Excel 2007/2010 (.xlsx) file parser that returns a collection of Matrix objects
  • wrap_excel - WrapExcel is to wrap the win32ole, and easy to use Excel operations with ruby. Detailed description please see the README.
  • write_xlsx_rails - xlsx renderer for Rails base on write_xlsx gem
  • Fastsheet - Fast spreadsheet reader using Rust native extensions.
  • whenever Cron jobs in Ruby
  • resque-scheduler A light-weight job scheduling system built on top of resque
  • rufus-scheduler Scheduler for Ruby
  • 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.

Libraries for scientific computing and data analyzing.

Libraries and software for indexing and performing search queries on data.

Libs for analytics, monitoring

  • rack-google-analytics Simple Rack middleware for implementing google analytics tracking
  • DataDog A monitoring service for IT, operations and development teams
  • Instrumental High-scale, non-blocking agent for Instrumental application monitoring
  • Keen IO Build analytics features directly into your Ruby apps

App templates for creating apps quickly

  • suspenders A Rails template with our standard defaults, ready to deploy to Heroku
  • ruby2-rails4-bootstrap-heroku A starter application based on Ruby 2, Rails 4 and Bootstrap for Sass, deployable on Heroku
  • rails-bootstrap Rails 4.1 starter app with the Bootstrap front-end framework
  • rails4-starterkit Rails 4.1 starter app with production ready performance, security, and authentication
  • cybele - Rails 4.x template with responder, simple form, haml, exception notification, etc …

Libraries for parsing and manipulating texts.

  • General

  • Specific Formats

  • Parser

    • Yomu - Read text and metadata from files and documents (.doc, .docx, .pages, .odt, .rtf, .pdf)

Libraries for tagging items.

  • acts-as-taggable-on - A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.

Libraries and tools for templating and lexing.

  • Slim A templating lang that reduce the syntax to the essential parts without becoming cryptic.
  • Haml HTML Abstraction Markup Language - A Markup Haiku
  • Tilt
  • Liquid

Libraries for testing codebases and generating test data.

  • Testing Frameworks

    • RSpec - BDD for Ruby
    • MiniTest - minitest provides a complete suite of testing facilities supporting TDD, BDD, mocking, and benchmarking
    • [Cucumber]
      • Cucumber Github - Cucumber is a tool that executes plain-text functional descriptions as automated tests
      • Cucumber Site - Behaviour Driven Development with elegacy and joy
    • 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.
    • Rubytest - Rubytest is a testing meta-framework useful for creating highly customize test suites or building whole new test frameworks.
      • BRASS - Bare-metal Ruby assertion system standard used by Rubytest.
      • Lemon - Strict unit test system built on top of Rubytest.
    • shoulda-matchers - Collection of testing matchers extracted from Shoulda
    • capybara - Acceptance test framework for web applications
  • Mock

    • RSpec-mocks - RSpec’s ‘test double’ framework, with support for stubbing and mocking
    • Mocha - Mocking and stubbing library with JMock/SchMock syntax, which allows mocking and stubbing of methods on real (non-mock) classes.
    • FlexMock - Flexible mocking for Ruby testing
  • Fake Data

    • Faker - A library for generating fake data such as names, addresses, and phone numbers
    • ffaker - Faker Refactored.
    • Forgery - Easy and customizable generation of forged data.
  • Code Coverage

    • simplecov Code coverage for Ruby 1.9+ with a powerful configuration library and automatic merging of coverage
  • Load Testing

  • Error Handler

Libraries for accessing third party APIs.

  • koala A lightweight, flexible library for Facebook
  • fb_graph A full-stack Facebook Graph API wrapper
  • twitter A Ruby interface to the Twitter API
  • tweetstream A simple library for consuming Twitter’s Streaming API
  • gitlab Ruby wrapper and CLI for the GitLab API
  • octokit.rb Ruby toolkit for the GitHub API
  • instagram The official gem for the Instagram API
  • linkedin Ruby wrapper for the LinkedIn API
  • twilio-ruby A Ruby gem for communicating with the Twilio API and generating TwiML
  • viewpoint-spws A Microsoft Sharepoint Web Services library for Ruby.
  • youtube_it An object-oriented Ruby wrapper for the YouTube GData API
  • flickraw Flickraw is a library to access flickr api
  • f00px Official 500px api ruby gem
  • rspotify Ruby wrapper for the Spotify Web API

Libraries for parsing URLs.

Libraries for manipulating video and GIFs.

  • streamio-ffmpeg Simple yet powerful ruby FFmpeg wrapper for reading metadata and transcoding movies

Libraries for extracting web contents.

Libraries for scraping websites.

Web development frameworks.

  • Ruby On Rails - Ruby on Rails is a full-stack web framework optimized for programmer happiness and sustainable productivity
  • Roda - Modular, scalable Ruby framework. Extremely fast, extremely efficient.
  • Hanami - (formerly Lotus) A complete full-stack application framework that is simple, fast and lightweight. Designed for scale.
  • Sinatra - Sinatra is a DSL for quickly creating web applications in Ruby with minimal effort.
  • Padrino - The Godfather of Sinatra provides a full-stack agnostic framework on top of Sinatra
  • Cramp - Cramp is a fully asynchronous real-time web application framework in Ruby
  • Cuba - Cuba is a microframework for web development originally inspired by Rum, a tiny but powerful mapper for Rack applications.
  • Pakyow - Pakyow is an open-source framework for the modern web. Build working software faster with a development process that remains friendly to both designers and developers. It’s built for getting along.
  • Hyperstack - A complete Isomorphic Ruby Framework using React, Opal and Rails

App server interface

  • puma A simple, fast, threaded, and highly concurrent HTTP 1.1 server for Ruby/Rack applications.
  • thin A thin and fast web server
  • trinidad Run Rails or Rack applications within an embedded Apache Tomcat container.
  • unicorn An HTTP server for Rack applications designed to only serve fast clients.
  • passenger A modern web server and application server for Ruby, Python, and Node.js.
  • pow Pow treats files and directories as ruby objects giving you more power and flexibility.
  • goliath is a non-blocking Ruby web server framework.

Libraries for woking with WebSocket.

  • Faye - Simple pub/sub messaging for the web
  • websocket-rails - Plug and play websocket support for ruby on rails.

Useful libraries or tools that don’t fit in the categories above.

  • packetfu A mid-level packet manipulation library for Ruby.
  • chatterbot A straightforward ruby-based Twitter Bot Framework, using OAuth to authenticate
  • sneakers A fast background processing framework for Ruby and RabbitMQ
  • ransack Object-based searching.
  • cinch The IRC Bot Building Framework
  • pry An IRB alternative and runtime developer console
  • rib A lightweight and extensible IRB replacement
  • jazz_hands Pry-based enhancements for the default Rails 3 and 4 consoles
  • awesome_print A Ruby library that pretty prints Ruby objects in full color exposing their internal structure with proper indentation.
  • friendly_id Slugging and permalink plugins for ActiveRecord
  • backup An elegant DSL in Ruby for performing backups on UNIX-like systems
  • kss Documenting CSS and generating styleguides
  • AASM - A library for adding finite state machines to Ruby classes
  • JsonCompare - Returns the difference between two JSON files
  • blankable - Adds blank slates to index view in Rails
  • tcmb_currency - T.C.M.B. currencies for Money Gem
  • enumerize - Enumerated attributes with I18n and ActiveRecord/Mongoid support
  • lol_dba - lol_dba is a small package of rake tasks that scan your application models and displays a list of columns that probably should be indexed.
  • annotate-models - Annotate ActiveRecord models
  • fast_attributes - FastAttributes adds attributes with their types to the class
  • Github Changelog Generator — automatically generate change log from your tags, issues, labels and pull requests on GitHub.
  • Letter Opener — Preview email in the default browser instead of sending it.
  • Auto HTML — Transforming URLs to appropriate resource (image, link, YouTube, Vimeo video,…).
  • OctoLinker - Navigate through projects on GitHub.com efficiently with the OctoLinker browser extension.
  • BetterDocs - Documentation with collection practices in ruby. Good for new ruby developers and beginners.

Plugins for various editors.

  • vim-ruby Vim/Ruby Configuration Files
  • vim-rails rails.vim: Ruby on Rails power tools

Where to discover things (libraries, news e.g) about Ruby.

People in Ruby World

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