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Comment by natertux | Hacker News Reader

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 ?

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One that I use all the time is shellcheck, and git-annex. Others in the mainly-used-by-programmers-category include xmonad and hledger. https://github.com/owickstrom has some GUI Haskell apps.

Facebook's Sigma and https://github.com/wireapp/wire-server may be the ones with the most non-programmer users?

http://postgrest.org/ and https://hasura.io/ seem interesting.

https://www.quora.com/What-is-the-largest-commercial-program... says the largest Haskell code-base is probably Standard Chartered trading system.

more at https://github.com/topics/haskell and https://serokell.io/blog/top-software-written-in-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.

GitHub semantic powers goto definition in GitHub IIRC. Here's why they use Haskell:

https://github.com/github/semantic/blob/master/docs/why-hask...

git-annex is a useful program written in Haskell

shellcheck.net/ is really nice to catch bugs in your bash scripts.

The dynamic tiling window manager Xmonad is written in Haskell and while I don't use it personally (I use bspwm), I've heard it's great.

Postgrest is written in Haskell

Also PureScript and Elm are to my knowledge written in Haskell..

PostgREST and Elm are great.

Hasura (GraphQL-on-Postgres)

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