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Haskell was the first thing that came to mind. I can show with one hand, by joining my pointer-finger and thumb, the number of people I know that use it.

It looks lovely, and it's something I'd very much like to learn some day but I can't for the life of me think of what I would use it for. Are there any killer apps out there for it?

At least with lisp, I can configure emacs ...

Well, it's a general use language. Also, there's purescript [1], a Haskell-to-javascript for the browser.

[1] http://www.purescript.org/

Pandoc and Xmonad are written in Haskell.

Interesting but again, short of contributing to these projects what am I going to do with Haskell?

Haskell is used in the industry, see: https://wiki.haskell.org/Haskell_in_industry

You could start your own project. You could contribute to an existing project. You could evangelize Haskell at your job, if possible.

All of these are hard, of course. It'll be easier to use a more mainstream language. But if Haskell strikes your fancy, maybe it's worth the effort?

> maybe it's worth the effort?

Yep. Sure. Just as soon as I get done shaving this Yak ;-)

Well, people have managed to successfully use Haskell in the industry. Occasionally someone with a success story even posts here on HN.

Write software, probably.

Well ... duh.

Also git-annex!

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