So I have some crazy ideas for language extensions/reinterpretations and ways I might try to implement them. But ghc is a complex beast and my crazy ideas have too many interrelationships for a noob like me to try to bold them onto it. After all, I have never worked on ghc - or any compiler for that matter. I did look at the code, but I reckon maybe I should gather some experience first before diving into that one. It would be even worse to offload my ideas onto someone else before I at least tried them and got some feedback. No fun for anyone. But of course I don't want to start from scratch. As fun as that could be, there's no need to reinvent all the wheels just for a different axle. And I hear rumors that there are other Haskell compilers out there, even if most of them live in the shadow/slipstream of their brother. Alas, I don't have any idea what their statuses and philosophies are. So maybe you can help me here: Have you experienced any of the alternative compilers as especially easy for a newcomer to pick up and play around with? If it helps, I would be satisfied with plain Haskell2010 or even Haskell 98, although some GADT and/or TypeFamilies code to butcher would be nice, too. The ideas are mostly about larger scale structures like whole functions. One representative example idea is "Could it help the implementation - and does it even make sense - to view a module as just a weirdly written zero parameter type class?" As I said: crazy ideas. I'm thankful for any thoughts and ideas. MarLinn