[Null-Set]

While not as suitable for actually playing tile based RPGs, I am partial to http://orteil.dashnet.org/experiments/dungeongenerator/ for the nice visual design of the generated dungeons.

[queuq]

This is quite cool, do you know what license it's using? Seems to be generating by JS? Could need this

[Null-Set]

It was made by https://twitter.com/Orteil42?s=17 .