Gofer (programming language)

Its syntax is closer to the earlier commercial language Miranda than the subsequently standardized Haskell. It lacks some of the features of Haskell (such as the deriving clause in data type definitions) but includes a number of features which were not adopted by Haskell (although some were later incorporated into GHC, such as generalizing the list comprehension syntax to support any monad, which is now available using the MonadComprehensions extension).