WxHaskell

The document discusses WxHaskell, which allows creating graphical user interfaces (GUIs) in Haskell using the wxWidgets library. It provides examples of creating basic windows and adding buttons, text boxes, and other widgets to the windows. It also discusses handling events from buttons by linking them to functions. The document recommends WxHaskell as a way to understand Haskell by creating GUI applications and interfacing with external data through the wxWidgets library.