The “cookbook” in TSR’s 1991 D&D tome, The Dungeon Master’s Design Kit, is a legendary cheat sheet for rapidly conceiving remarkably fleshed out RPG scenarios by rolling dice and consulting tables. Donjon automates the template-and-die-driven scenario generator contained in TSR’s text, enabling visitors to spin up a near infinitude of compelling scenarios simply by hitting F5. But the “Adventure Generator” is just the tip of the iceberg at donjon, as the site provides an unequalled wealth of RPG map, character, and worldbuilding generators, all of which are designed with a great deal of thoughtfulness and elegance. Even if you aren’t into RPGs, donjon is worth a visit for its many clever takes on the random story generator and the procedural generation of narrative artifacts and spaces.
See also: RPG Athenaeum.