Finally, a new functional programming language has hit the top 20. Most people thought that hot functional languages such as Scala (#66), Clojure (#107), Haskell (#35) or Erlang (#48) would be the ones that would be the first to compete seriously with the mother of all functional languages Lisp. But it appears to be Microsoft language F#. The recent rise in popularity of F# comes as no suprise. Apart from being a nicely designed language, F# is available in the latest version of Microsoft's Visual Studio (2010).