Traveling Ruby is a project which supplies self-contained, "portable" Ruby binaries: Ruby binaries that can run on any Linux distribution and any OS X machine. It also has Windows support (with some caveats). This allows Ruby app developers to bundle these binaries with their Ruby app, so that they can distribute a single package to end users, without needing end users to first install Ruby or gems. Ruby is one of our favorite programming languages. Most people use it for web development, but Ruby is so much more. We at Phusion have been using Ruby for years for writing sysadmin automation scripts, developer command line tools and more. Heroku's Toolbelt and Chef have also demonstrated that Ruby is an excellent language for these sorts of things.