[awesomelvin]

I recently fell in love with Agda and it seems like you'd like it too. It's basically Haskell but even more mathematical, pure, abstract and total.

[mncharity]

Agda[1] is fun. Also Idris[2] - more programming language, less proof assistant.

[1] https://wiki.portal.chalmers.se/agda/pmwiki.php https://github.com/agda/agda [2] https://www.idris-lang.org/