[vignesh_m]

I've tried functional languages (Haskell) before and found them fun, but couldn't find a good project I can use them in.

Can someone suggest a fun project, which can showcase the features of functional programming?

[grasleya]

Functional languages are perfectly capable languages so you can typically use them for anything you'd use any other language for. But if you want a project that specifically showcases functional programming, writing a parser using parser combinators can be fun and instructive.

[novembermike]

I don't like to think of a lot of these languages in terms of "functional". Haskell specifically does follow a functional paradigm, but Erlang/Elixir is more about the actor model and the functional aspects support that.