This is the Yet Another Try Ruby. It allows you to run a github's gist in the ruby sandbox.
The rungist uses iframes to display the result, it's possible to run the ERB template and apply styles to the output.
- Ruby (safe JRuby sandbox)
- HTML+ERB (templating system)
- CSS (styles are applied to all iframes)
Under the hood
It was made to show in action: JRuby/Sinatra/Backbone.js, Just for Fun :).
The code is well-tested and hosted on GitHub.