See for instance:
* https://github.com/clux/autonomy - prelude like thing
* https://github.com/clux/subset - basically Data.List
* https://github.com/clux/operators - currying helpers
* https://github.com/clux/interlude - a collection of the above 3
It has made my JavaScript development very enjoyable. JavaScript really doesn't suck have to suck. You can write very elegant code in it. It's just not as elegant as Haskell.