Topics / #haskell

Haskell projects on GitHub

The Haskell functional programming language and its tooling.

As of October 17, 2026, the most-starred Haskell projects on GitHub are pandoc (46.6K stars), shellcheck (40.2K stars) and graphql-engine (32.1K stars). GitHub.Locker tracks 12 Haskell repositories with 242.7K stars combined. The fastest-growing on October 16 was simplex-chat, with +7 stars in a day.

12Projects

242.7KStars in total

+21Stars in a day

Browse in the catalog →github.com/topics/haskell ↗

Hot right now

Most stars gained in a day · Oct 16

simplex-chat

simplex-chat/simplex-chat · ★ 19.6K

SimpleX Chat is a private messaging app for phones and desktops, and the first messaging network that uses no user identifiers of any kind — nobody can link your conversations to who you are. It is 100% private by design.

pandoc

jgm/pandoc · ★ 46.6K

Pandoc is a Haskell library for converting documents from one markup format to another, plus the command-line tool built on top of it — a universal markup converter.

shellcheck

koalaman/shellcheck · ★ 40.2K

ShellCheck is a free static analysis tool for shell scripts: it reads your bash/sh code and reports warnings and suggestions for problems in it.

unison

unisonweb/unison · ★ 6.8K

Unison is a statically-typed functional programming language with type inference, an effect system, and advanced tooling, built around the idea of content-addressed code where functions are identified by a hash of their implementation rather than a name.

The all-time top

12 projects · by stars

#1 · jgm/pandoc
pandoc
Pandoc is a Haskell library for converting documents from one markup format to another, plus the command-line tool built on top of it — a universal markup converter.
46.6K
#2 · koalaman/shellcheck
shellcheck
ShellCheck is a free static analysis tool for shell scripts: it reads your bash/sh code and reports warnings and suggestions for problems in it.
40.2K
#3 · hasura/graphql-engine
graphql-engine
Hasura is an open source engine that instantly generates realtime GraphQL (and REST) APIs over your databases, with fine-grained access control and the ability to trigger webhooks on database events.
32.1K

4
postgrest
27.7KPostgREST/postgrest · Haskell
PostgREST is a standalone server that turns any existing PostgreSQL database into a full RESTful API automatically — no backend code to write.
5
simplex-chat
19.6Ksimplex-chat/simplex-chat · Haskell
SimpleX Chat is a private messaging app for phones and desktops, and the first messaging network that uses no user identifiers of any kind — nobody can link your conversations to who you are. It is 100% private by design.
6
compiler-explorer
19.1Kcompiler-explorer/compiler-explorer · TypeScript
An interactive compiler exploration website: edit code in C, C++, Rust, Go or any of 30+ supported languages and see the compiled assembly update in real time. Try it at godbolt.org or self-host.
7
quine-relay
14.6Kmame/quine-relay · Ruby
Quine Relay is a self-replicating program chain (an 'uroboros' quine) where a Ruby program generates a Rust program, which generates a Scala program, and so on through 128 different programming languages, until the final language outputs the original Ruby source code again.
8
hadolint
12.5Khadolint/hadolint · Haskell
Hadolint is a smarter Dockerfile linter written in Haskell that helps you build best-practice Docker images. It flags mistakes and bad patterns in your Dockerfile before you build the image.
9
milewski-ctfp-pdf
11.7Khmemcpy/milewski-ctfp-pdf · TeX
An unofficial PDF and LaTeX version of Bartosz Milewski's 'Category Theory for Programmers' book, converted from his blog post series with his permission.
10
fp-ts
11.5Kgcanti/fp-ts · TypeScript
fp-ts is a library for typed functional programming in TypeScript, bringing patterns and abstractions like Option, Either, IO, Task, Functor, Applicative and Monad to TypeScript apps.
11
unison
6.8Kunisonweb/unison · Haskell
Unison is a statically-typed functional programming language with type inference, an effect system, and advanced tooling, built around the idea of content-addressed code where functions are identified by a hash of their implementation rather than a name.
12
morloc
219morloc-project/morloc · Rust
Morloc is a strongly-typed, polyglot compiler: it composes functions written in different languages under one common type system and turns each module into a CLI, an API and an MCP server.