From: Steve Klabnik <steve@...>
Date: 2011-07-27T08:26:57+09:00
Subject: Re: Difference between Ruby Versions

They're different.

Just kidding!

Ruby: this is the default version of Ruby. The standard.
JRuby: this is Ruby that runs on the Java virtual machine.
IronRuby: this Ruby runs on .NET.
Ruby in Steel: this is a plugin for Visual Studio that helps you write Ruby code
Ruby on Rails: this is a web application development framework for Ruby
Ruby Gnome: this lets you build GTK applications for Linux in Ruby
FxRuby: build desktop applications with Ruby

Anything else?