Cult Generator
I can think of numerous applications for a procedural cult generator. Maybe you need a group to summon a procedurally generated demon, or maybe your Trail of Cthulhu campaign could use help with plot inspiration.
While it’s not the only source of generated cults, what’s unique about this one is that it’s implemented in Twine. It’s a good reminder that you don’t need fancy technology or elite coding skills to make interesting procedural generation projects. Start with the tools you know how to use. Learn new things as you need them. Make stuff.