Metasploit Framework

Vagrant is a tool for building and distributing development environments.

The Ruby Programming Language

A simple, Git-powered wiki with a local frontend and support for many kinds of markup and content.

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

A library for generating fake data such as names, addresses, and phone numbers.

An opinionated framework for creating REST-like APIs in Ruby.

Create beautiful JavaScript charts with one line of Ruby

Sequel: The Database Toolkit for Ruby

Manage your Ruby application's gem dependencies

Wraith — A responsive screenshot comparison tool

Rails authentication with email & password.

minitest provides a complete suite of testing facilities supporting TDD, BDD, and benchmarking.

A high-performance web server for Ruby, supporting HTTP/1, HTTP/2 and TLS.

Toolkit for developing sleek command line apps.

All sorts of useful information about every country packaged as convenient little country objects. It includes data from ISO 3166 (countries and states/subdivisions ), ISO 4217 (currency), and E.16…

Generic interface to multiple Ruby template engines

Ruby JSON Schema Validator

A beautiful and powerful interactive command line prompt

Gruff graphing library for Ruby

Standards-compliant WebSocket client and server

Ruby FFI binding to the Networking and Cryptography (NaCl) library (a.k.a. libsodium)

Ruby bindings for the SQLite3 embedded database

Terminal output styling with intuitive and clean API.

In-memory driver for redis-rb, useful for development and test environments

Pure Ruby gem that implements the MQTT protocol, a lightweight protocol for publish/subscribe messaging.

A pure ruby implementation of Google's Protocol Buffers

Universal Ruby library to handle WebSocket protocol

A set of bindings for the GNOME libraries to use from Ruby.

WebSocket protocol handler with pluggable I/O