Alternatives and similar repositories for keys:

Users that are interested in keys are comparing it to the libraries listed below

• atzeus / type-aligned
  Various type-aligned sequence data structures.
  ☆20Updated 3 years ago
• cartazio / monad-ste
  ST with efficient exceptions
  ☆20Updated 8 years ago
• AndrasKovacs / flat-maybe
  Rust-style strict Maybe in Haskell: no space/indirection overhead.
  ☆18Updated last year
• well-typed / basic-sop
  Basic examples and functions for generics-sop
  ☆20Updated last year
• ocramz / trie-perf
  Performance shootout of various trie implementations
  ☆18Updated 5 years ago
• sjoerdvisscher / free-functors
  Provides free functors that are adjoint to functors that forget class constraints.
  ☆28Updated 4 months ago
• DanielSchuessler / th-expand-syns
  Expands type synonyms in Template Haskell ASTs
  ☆11Updated last month
• nfrisby / invariant-functors
  the 'invariant' Haskell package for invariant functors
  ☆15Updated last month
• ekmett / unique
  fast unique variables
  ☆10Updated 3 years ago
• jtdaugherty / text-zipper
  A text editor zipper libary
  ☆17Updated 2 months ago
• fumieval / mtl-c
  Monad transformers in CPS
  ☆11Updated 8 years ago
• basvandijk / monad-batcher
  An applicative monad that batches commands for later more efficient execution
  ☆27Updated 6 years ago
• adinapoli / mandrill
  Pure Haskell client for the Mandrill JSON API
  ☆17Updated 2 months ago
• Gabriella439 / Haskell-Total-Library
  Exhaustive pattern matching using lenses, traversals, and prisms
  ☆32Updated 2 years ago
• kosmikus / records-sop
  Experimental implementation of generic record subtyping
  ☆18Updated 8 months ago
• m0rphism / printcess
  Haskell pretty printing library supporting indentation, mixfix operators, and automatic line breaks.
  ☆14Updated 7 years ago
• Gabriella439 / Haskell-Index-Core-Library
  Indexed Types
  ☆13Updated 2 years ago
• danidiaz / foldl-transduce
  ☆8Updated 3 years ago
• kaizhang / clustering
  fast clustering algorithms
  ☆15Updated 5 years ago
• haskell-compat / deriving-compat
  Backports of GHC deriving extensions
  ☆13Updated last month
• sjoerdvisscher / fmlist
  FoldMap lists
  ☆12Updated last year
• deepfire / nh
  Manage Nix Haskell override sets
  ☆11Updated 6 years ago
• conal / total-map
  Finitely represented /total/ maps
  ☆15Updated 5 years ago
• jfischoff / are-mutable-references-in-haskell-fast
  Code to go along with the blog post "Are Mutable References in Haskell Fast?"
  ☆10Updated 7 years ago
• edsko / tracetree
  Visualization of Haskell data structures
  ☆15Updated 11 months ago
• mitchellwrosen / safe-exceptions-checked
  Safe, checked exceptions
  ☆13Updated 6 years ago
• UnkindPartition / lexer-applicative
  Applicative lexer
  ☆13Updated 5 years ago
• ezyang / deepseq-magic
  Deep evaluation of data structures without NFData
  ☆10Updated 9 years ago
• jcristovao / newtype-generics
  A typeclass and set of functions for working with newtypes.
  ☆10Updated 2 years ago
• ghcjs / ghcjs-ffiqq
  QuasiQuoter for GHCJS JavaScript FFI
  ☆20Updated 8 years ago