Personally, I really dig Unison. Its syntax is inspired by Haskell, but it has a ton of really interesting features like content-addressed code and nice algebraic effects known as abilities. We even have a Unison track on Exercism!
Vlang - Very similar to Go, but tries to address some of the issues with Go. Brings the syntax of Go closer to Python. Waiting for it to mature more before giving it a real chance.