Can people tell me what useful program were produced in Haskell ? I know a few for Ocaml but I dont know much Haskell, so dont know yet any useful program written in Haskell. The program I know for Ocaml are: - coccinelle (semantic patching used by linux kernel devs) - FramaC (formal verification) - Coq (proof assistant) - Rust compiler (I think they bootstraped the language by writting a compiler in ocaml first, now the compiler is written in rust itself)

I just saw pandoc. It seems nice. I know parsec. But I would like to know what kind of haskell programs are actually used in real life ? I know Jane Street does all their dev in Ocaml. Is there similar company for Haskell ?

Facebook uses Haskell for [Haxl](https://github.com/facebook/Haxl), Standard Chartered has a their own Haskell [compiler](https://www.reddit.com/r/haskell/comments/6im268/standard_ch...) and a massive code base in Haskell. [Agda](https://github.com/agda/agda) and [Idris](https://github.com/idris-lang/Idris-dev) were mostly written in Haskell as well.