acme-schoenfinkel

This library generalizes curry and uncurry and also gives them more appropriate names. You can use it by importing Control.Category.Schoenfinkel:

import Control.Category.Schoenfinkel

main :: IO ()
main = print (unschoen atan2 (2, 3))

For your convenience there are also Unicode variants of the two functions:

main = print (unschön atan2 (2, 3))