Completely agree. Nice website examples for general purpose programming languages IMO:

http://www.scala-lang.org/

https://www.haskell.org/

http://www.gnu.org/software/guile/

For altJS languages:

http://coffeescript.org/

EDIT:

Some websites that could be 'freshened up':

http://elixir-lang.org/

http://elm-lang.org/

https://www.python.org/

Some websites that definitely should be 'freshened up':

http://clojure.org/

http://www.lua.org/