Repl.it is so simple that even more advanced programmers might find value there. You can execute simple snippets in an interactive repl, or a main file, or host

Repl.it is so simple that even more advanced programmers might find value there. You can execute simple snippets in an interactive repl, or a main file, or host a simple blog for free with all of your static files sitting in one place ready to be edited from anywhere. Of course there is a lot more, but those seem pretty cool. There are others of course, but you can collaborate and teach people to code through that platform for freemium as well:)