The Module Browser is the Haskell-aware equivalent of the Resource Navigator. It presents all elements of a Haskell project, but in a more language-specific way. This includes not only compilation units (Haskell source files), but also import libraries, the project executable etc.
The Module Browser can be configured to filter out any type of language elements. The filter settings can be found in the dropdown view menu directly on the view.
(In the future this View will allow browsing through more fine-grained elements and not stop on the level of compilation units.)