Really exciting to watch the developments in OCaml/Reason web frameworks/libraries. I love the language and wish I could use it instead of Ruby for my personal projects at least. Others that have caught my interest are:
Sihl: https://github.com/oxidizing/sihl
ReWeb: https://github.com/yawaramin/re-web/
Of course, if you're interested in OCaml/Reason and don't know about Revery you're missing out.