Alternatives and similar repositories for effects:

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

• ekmett / zippers
  Zippers based on lenses and traversals
  ☆39Updated last year
• gelisam / typelevel-rewrite-rules
  rewrite rules for type-level equalities
  ☆62Updated last year
• tweag / distributed-closure
  Serializable closures for distributed programming.
  ☆64Updated last year
• aaronlevin / free-vl
  van Laarhoven Free Monad with Extensible Effects
  ☆23Updated 9 years ago
• dorchard / type-level-sets
  Type-level sets for Haskell (with value-level counterparts and various operations)
  ☆66Updated last year
• alanz / machines-play
  Playing with https://github.com/ekmett/machines
  ☆51Updated 7 years ago
• phadej / kleene
  Kleene algebra, regular expressions
  ☆32Updated last year
• ekmett / profunctors
  Haskell 98 Profunctors
  ☆71Updated last month
• well-typed / generics-sop
  Generic Programming using True Sums of Products
  ☆163Updated 4 months ago
• vmchale / recursion_schemes
  Recursion schemes for Idris
  ☆64Updated 6 years ago
• ekmett / distributive
  Dual Traversable
  ☆42Updated last year
• rampion / kinder-functor
  An alternate definition of Haskell's Functor typeclass
  ☆42Updated 5 years ago
• camfort / reprinter
  Scrap Your Reprinter - A Datatype Generic Algorithm for Layout-Preserving Refactoring
  ☆27Updated 4 years ago
• obsidiansystems / dependent-map
  Dependently-typed finite maps (partial dependent products)
  ☆66Updated 2 months ago
• agrafix / superrecord
  Haskell: Supercharged anonymous records
  ☆83Updated 2 years ago
• UnkindPartition / monad-classes
  A more flexible mtl
  ☆64Updated 7 years ago
• idris-hackers / idris-free
  Free Monads and useful constructions to work with them
  ☆26Updated 6 years ago
• roman / Haskell-capataz
  OTP-like supervision trees in Haskell
  ☆62Updated 5 years ago
• jaspervdj / psqueues
  Priority Search Queues in three different flavors for Haskell
  ☆66Updated 3 months ago
• ekmett / bound
  Combinators for manipulating locally-nameless generalized de Bruijn terms
  ☆123Updated 9 months ago
• turingjump / bookkeeper
  ☆54Updated 6 years ago
• haskell-trasa / trasa
  Safe web routing in haskell
  ☆30Updated 2 years ago
• cohomolo-gy / homotopy-type-theory-notes
  HoTT Note-taking action
  ☆25Updated 6 years ago
• yav / dump-core
  ☆45Updated 3 years ago
• vincenthz / hs-memory
  haskell memory
  ☆48Updated last year
• chrisdone-archive / labels
  Declare and access tuple fields with labels
  ☆58Updated 6 years ago
• mokus0 / monad-loops
  Some useful control operators for looping
  ☆48Updated 5 years ago
• Gabriella439 / managed
  A monad for managed values
  ☆50Updated 2 years ago
• int-index / ether
  Monad Transformers and Classes
  ☆77Updated 5 years ago
• Lysxia / profunctor-monad
  Bidirectional programming in Haskell with monadic profunctors
  ☆46Updated 2 years ago