Every story and comment from the Hacker News API, in a layout borrowed from 2001.
A comment on Compile .NET in your browser using Compilify. Parent comment
Edit: here's the one I've used before, complete with integrated debugger: http://www.coderun.com/
There are no comments on this comment yet.
Edit: here's the one I've used before, complete with integrated debugger: http://www.coderun.com/