Sandy Maguire: Don't Eff It Up: Free Monads in Action
Channel: Bay Area Haskell
Date: 26/04/2017

Presented at BayHac 2017
https://wiki.haskell.org/BayHac2017

Slides:
http://reasonablypolymorphic.com/dont-eff-it-up

freer-effects on Hackage:
http://hackage.haskell.org/package/freer-effects