- Scotty / persistent / monad transformers
- GTK
- ghc-mod
- Monad transformers
- Haxl – Simon Marlow/Facebook's concurrency (?) library
- Extensible effects
- FRP
- ghc-mod
- Functional pearls
- Expression problem
- Nix
- Monad transformers
- Typeclassopedia
- Contravariant functors
- Profunctor / Bifunctor
- Foldable
- Traversable
- Lenses
- Comonads
- Applications of comonads
- Yesod
- Pipes
- QuickCheck
- GHC rewrite rules
- Performance
- Unpacking, strictness, inlining, etc.
- Core
- Tooling