http://micropython.org/live
Multiple people can use it at once and you can watch what other people do. There is a queue for code if more than one person submits a job at the same time.
Let me know if you have any suggestions for improvements! Or if you find bugs
![Smile :)](./images/smilies/icon_e_smile.gif)
Note that you have 10 seconds maximum job time and the board is hard-reset between jobs. The filesystems are also read-only.