Bad news. The server hosting The Ruby Toolbox went bust on the evening of June 7th. While I do have backups, the original source code is in a very outdated state so I currently don't feel it makes sense to try and get it running again.

For the time being, here is a very stripped down version of the Ruby Toolbox's contents.

Update June 13th: I'd like to invite you to join the discussion on the future of the Toolbox on github. You can also get in touch directly on Twitter.

Christoph
 Score 0.97

Gosu

2D game development library. Gosu features easy to use and game-friendly interfaces to 2D graphics and text (accelerated by 3D hardware), sound samples and music as well as keyboard, mouse and gamepad/joystick input. Also includes demos for integration with RMagick, Chipmunk and OpenGL.

 Rubygem gosu
 Github jlnr/gosu
 Score 0.38

Chingu

OpenGL accelerated 2D game framework for Ruby. Builds on Gosu (Ruby/C++) which provides all the core functionality. Chingu adds simple yet powerful game states, prettier input handling, deployment safe asset-handling, a basic re-usable game object and stackable game logic.

 Rubygem chingu
 Github ippa/chingu
 Score 0.24

Gamebox

Framework for building and distributing games using Gosu

 Rubygem gamebox
 Github shawn42/gamebox
 Score 0.14

ray

Written to play with Ruby

 Rubygem ray
 Github Mon-Ouie/ray
 Score 0.12

Chipmunk

Enhanced ruby bindings for the chipmunk game physics engine.

 Rubygem chipmunk
 Github beoran/chipmunk
 Score 0.09

Rubygame

Clean and powerful library for game programming

 Rubygem rubygame
 Github jacius/rubygame
 Score 0.07

metro

Metro is a 2D Gaming framework built around gosu (game development library). Metro makes it easy to create games by enforcing common conceptual structures and conventions.

 Rubygem metro
 Github burtlo/metro
 Score 0.05

fidgit

Fidgit is a GUI library built on Gosu/Chingu

 Rubygem fidgit
 Github Spooner/fidgit
 Score 0.03

Jemini

Jemini is a game library designed to allow creation of reusable features. How many times has someone implemented the aiming on a first person shooter, or a minimap on a real time strategy? Jemini comes packaged with lots of behaviors out of the box, with the ability to easily author more. Jemini uses Phys2D and Slick for physics and graphics, with 3D on the roadmap.

 Rubygem jemini
 Score 0.01

gioco

Gioco is a easy to implement gamification gem based on plug and play concept. Doesn't matter if you already have a full and functional database, Gioco will smoothly integrate everything and provide all methods that you might need.

 Rubygem gioco
 Score 0.01

gosu_android

Gosu-Android is an implementation for Android devices of the multiplatform Gosu library.

 Score 0.01

kolb

A CYOA game engine

 Rubygem kolb
 Github ali/kolb
 Score 0.01

Flonkerton

A simple framework that aims to improve your Gosu experience.

 Rubygem flonkerton