Quoting /u/kamatsu (from reddit): "Some context. This is a very early version released by /u/chak in time for ICFP. There are lots more features planned, so don't view this as the final product."
Comparing it to HP doesn't really make sense; it's a very early stage IDE with some yet-unreleased libraries and Xcode-like features/interaction (see Playgrounds) by a known GHC/Haskell developer.
Indeed, I should have made it clear that I was looking for an appropriate comparison, not meaning to suggest that HP (which was just the first thing that came to mind) was an appropriate comparison. Thanks for the insight!
Comparing it to HP doesn't really make sense; it's a very early stage IDE with some yet-unreleased libraries and Xcode-like features/interaction (see Playgrounds) by a known GHC/Haskell developer.