I wouldn't call its ecosystem great, but if you like complex type hackery and don't need to do anything very complicated, Ur/Web can get you quite far. It's ve

I wouldn't call its ecosystem great, but if you like complex type hackery and don't need to do anything very complicated, Ur/Web can get you quite far. It's very hard to learn, especially if you're not that familiar with Haskell and SML/OCaml, but once you grok it writing CRUD apps is a breeze. Just be prepared to spend a lot of time looking at the standard library's signature files.