Haskell Effects

Open-source Haskell projects categorized as Effects | Edit details

Top 14 Haskell Effect Projects

  • kitten

    A statically typed concatenative systems programming language.

    Project mention: my cat is installing debian 10 | reddit.com/r/linuxmemes | 2021-10-20

    Kitten lang

  • fused-effects

    A fast, flexible, fused effect system for Haskell

    Project mention: Where's more discussion of the designs of effect systems? | reddit.com/r/ProgrammingLanguages | 2021-11-17

    Languages such as Koka only support algebraic effects, not scoping operations such as catch and listen. The Effect Handlers in Scope paper introduces scoping operations, which lead to the Haskell libraries fused-effects and polysemy, but they turned out to have some weird semantics. eff is her effort to fix that.

  • SonarQube

    Static code analysis for 29 languages.. Your projects are multi-language. So is SonarQube analysis. Find Bugs, Vulnerabilities, Security Hotspots, and Code Smells so you can release quality code every time. Get started analyzing your projects today for free.

  • capability

    Extensional capabilities and deriving combinators

    Project mention: Haskell doesn't make sense without pure functions | reddit.com/r/haskell | 2021-10-02
  • lawvere

    A categorical programming language with effects

    Project mention: Lawvere: A categorical programming language with effects | news.ycombinator.com | 2021-07-18
  • extensible-effects

    Extensible Effects: An Alternative to Monad Transformers

    Project mention: A solid GUI Framework for Haskell? | reddit.com/r/haskell | 2021-06-27

    Why do you need a GUI library, if you can write your application using extensible effects frameworks, just choose any and enjoy!

  • avail

    Low-overhead effect management for concrete monads

    Project mention: Effect is a phantom (or, the redundant constraint pattern) | reddit.com/r/haskell | 2021-09-14

    Yes, this is what I did in the WIP availability library, except that I used the reflection trick instead of ImplicitParams. Conceptually they are the same.

  • effet

    An effect system based on type classes, written in Haskell.

    Project mention: Monthly Hask Anything (May 2021) | reddit.com/r/haskell | 2021-05-05

    You may also be interested in effet, which is an mtl-like effect system which tries to overcome the limitations of mtl.

  • OPS

    OPS - Build and Run Open Source Unikernels. Quickly and easily build and deploy open source unikernels in tens of seconds. Deploy in any language to any cloud.

  • effects


  • joint

    Extremely simple effect system for Haskell (by iokasimov)

  • program

    A library for writing programs with environments and managed resources, written in Haskell. (by typedbyte)

    Project mention: Opinions on Reader + Continuation-based IO? | reddit.com/r/haskell | 2021-12-01

    Yes, I just uploaded it to https://github.com/typedbyte/program.

  • effects-parser

    Parser Effect for the Control.Effects Library

  • fused-effects-random

    Random number generation for fused-effects.

  • freer-indexed

    Freer parameterized monads

  • trans-fx-core

    Monadic effects in Haskell with transformer transformers

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020). The latest post mention was on 2021-12-01.

Haskell Effects related posts


What are some of the best open-source Effect projects in Haskell? This list will help you:

Project Stars
1 kitten 939
2 fused-effects 541
3 capability 200
4 lawvere 193
5 extensible-effects 172
6 avail 36
7 effet 34
8 effects 19
9 joint 6
10 program 3
11 effects-parser 3
12 fused-effects-random 3
13 freer-indexed 1
14 trans-fx-core 0
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