llpp, depending on your definition of "fully formed".
And there is/was a tiling window manager, but everyone I know who used it at some point migrated away because the configuration was Haskell as well.
And there is/was a tiling window manager, but everyone I know who used it at some point migrated away because the configuration was Haskell as well.
Still use it with gnome and it's the only reason I can half read Haskell!