Stephen Downes

This is a really nice teaching tool, because it's a nice working tool. "Introducing Multiplayer: code with friends in the same editor, execute programs in the same interpreter, interact with the same terminal, chat in the IDE, edit files and share the same system resources, and ship applications from the same interface!" Open a new editor on the https://repl.it/ website and then click the Multiplayer icon (upper left) to get it started. Sadly, Repl.it doesn't support Perl (complains the last living Perl coder) (though there's a Python shell that will support a limited Perl).