Ruby on Rails

Vagrant is a tool for building and distributing development environments.

A deployment automation tool built on Ruby, Rake, and SSH.

A Ruby static code analyzer and formatter, based on the community Ruby style guide.

Classy web-development dressed in a DSL (official / canonical repo)

A runtime developer console and IRB alternative with powerful introspection capabilities.

Guard is a command line tool to easily handle events on file system modifications.

EventMachine: fast, simple event-processing library for Ruby programs

The open source error catcher that's Airbrake API compliant

Ruby: parallel processing made simple and fast

Padrino is a full-stack ruby framework built upon Sinatra.

Hashie is a collection of classes and mixins that make Ruby hashes more powerful.

Heavy metal SOAP client

A statesmanlike state machine library.

(offically at github.com/sinatra/sinatra) Classy web-development dressed in a DSL

DataMapper - Core

A Ruby gem for the JIRA REST API

Connect to Pry remotely

Pry navigation commands via debugger (formerly ruby-debug)

Atlassian JIRA Core wrapped in a Docker image

a ruby workflow engine (dead)

A rule engine written in Ruby.

Parse command line arguments from nothing more than a usage message

Universal Ruby library to handle WebSocket protocol

A plugin for Sinatra to provide a DSL extension for using Thin for asynchronous responses

OAuth implementation for Ruby. Note official maintained version is now at http://github.com/mojodna/oauth

"Bot-end" Ruby framework to quickly build and launch a Facebook Messenger chatbot

RESTish wrapper for ruote workflow engine

Assert utility for ruby

Communicating Sequential Processes (CSP) in Ruby