keyed functors
OTHER License
Control.Lens.Action
Hash consing for arbitrary Haskell data types
categories from category-extras
Haskell 98 Profunctors
Category theory for Haskell with a lens flavor (you need GHC 7.8.3, not 7.8.2 to build this!)
Tools for programming with ConstraintKinds in GHC
playground for working with succinct data structures
A constant-memory approximation of set membership
Bit twiddling and bitwise serialization primitives
the EitherT monad transformer
Semigroups, specialized containers and a general map/reduce framework
Zippers based on lenses and traversals
infinite search in finite time with Hilbert's epsilon
Higher-rank hashable
Indexed Functors for GHC 7.6