ATO is a online code sandbox, with an emphasis on niche languages. If you ever wanted to try APL or Chapel but didn’t feel like downloading the whole language, here ya go.
A nicer-looking TIO! Thanks :)
it’s from pxeger, who is also a user on code golf stack exchange. Since TIO will likely be stagnant for the near future, ATO allows contributions and has more chances for new languages to be added.