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dotnet/fsharp
The F# compiler, F# core library, F# language service, and F# tooling integration for Visual Studio
MITAug 28, 2026 · metrics 2.10.0
All tags
Catalogue tag
#functional-programming
Every repository in the public record carrying this tag — from its GitHub topics or the keywords its package registries publish. Health is measured under the same versioned methodology as the rest of the record.
81 records
npm
Effect-TS/effect
Build production-ready applications in TypeScript
MITOct 20, 2026 · metrics 2.10.0
PyPI
dry-python/returns
Make your functions return something meaningful, typed, and safe!
BSD-2-ClauseSep 17, 2026 · metrics 2.10.0
PyPI
metaopt/optree
OpTree: Optimized PyTree Utilities
Apache-2.0Sep 10, 2026 · metrics 2.10.0
RubyGems
scala/scala
Scala 2 compiler and standard library. Scala 2 bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3
Apache-2.0Aug 27, 2026 · metrics 2.10.0
Maven
arrow-kt/arrow
The perfect companion for your Kotlin journey - Inspired by functional, data-oriented and concurrent programming
Custom licenseAug 28, 2026 · metrics 2.10.0
PyPI
softwaremill/tapir
Rapid development of self-documenting APIs
Apache-2.0Sep 8, 2026 · metrics 2.10.0
NuGet
aardvark-platform/aardvark.base
Aardvark.Base is the foundation of the open-source Aardvark Platform for visual computing, real-time graphics, and visualization.
Apache-2.0Sep 14, 2026 · metrics 2.10.0
Packagist
phel-lang/phel-lang
A functional, Lisp-inspired language that compiles to PHP. Inspired by Clojure, Phel brings macros, persistent data structures, and expressive functional idioms to the PHP ecosystem.
MITSep 12, 2026 · metrics 2.10.0
Go
IBM/fp-go
Functional programming library for Go 1.24+, inspired by fp-ts. Uses generic type aliases for a clean, composable API. Provides Option, Either, Result, IO, IOResult, Reader, and ReaderIOResult monads, plus optics (Lens, Prism, Traversal) for immutable data manipulation. Supports Functor, Applicative, and Monad abstractions with do-notation-style
Apache-2.0Sep 10, 2026 · metrics 2.10.0
PyPI
AnswerDotAI/fastcore
Python supercharged for the fastai library
Apache-2.0Aug 27, 2026 · metrics 2.10.0
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typelevel/frameless
Expressive types for Spark.
Apache-2.0Sep 19, 2026 · metrics 2.10.0
npm
darklang/dark
Darklang main repo, including language, backend, and infra
Apache-2.0Sep 19, 2026 · metrics 2.10.0
PyPI
dbrattli/Expression
Functional programming for Python
MITSep 18, 2026 · metrics 2.10.0
PyPI
nerevu/riko
A Python stream processing engine modeled after Yahoo! Pipes
MITSep 18, 2026 · metrics 2.10.0
Packagist
sanmai/pipeline
Build streaming pipelines in PHP. The missing pipe operator. General-purpose collections pipeline. Since 2017.
Apache-2.0Sep 13, 2026 · metrics 2.10.0
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takapi327/ldbc
ldbc (Lepus Database Connectivity) is a pure functional database connectivity layer for Scala 3. It provides a type-safe API with first-class support for multiple effect systems — Cats Effect 3, ZIO, and plain Future.
MITOct 19, 2026 · metrics 2.10.0
npm
Effect-TS/language-service
Effect Language Service Plugin (LSP)
MITSep 15, 2026 · metrics 2.10.0
Maven
apache/groovy
Apache Groovy: A powerful multi-faceted programming language for the JVM platform
Apache-2.0Aug 28, 2026 · metrics 2.10.0
npm
zio/zio-prelude
A lightweight, distinctly Scala take on functional abstractions, with tight ZIO integration
Apache-2.0Oct 21, 2026 · metrics 2.10.0
Go
135yshr/meow
Meow Programming Language — a cat-themed functional programming language that transpiles .nyan files to Go
MITOct 20, 2026 · metrics 2.10.0
Go
hovsep/fmesh
Flow Based Programming in Go
MITSep 20, 2026 · metrics 2.10.0
npm
jordanburke/functype
A Functional Library for TypeScript based on Scala
MITSep 18, 2026 · metrics 2.10.0
Maven · RubyGems
kickstarter/android-oss
Kickstarter for Android. Bring new ideas to life, anywhere.
Apache-2.0Oct 19, 2026 · metrics 2.10.0
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atnos-org/eff
Eff monad for cats - https://atnos-org.github.io/eff
MITOct 19, 2026 · metrics 2.10.0
Maven
javadev/underscore-java
java port of Underscore.js
MITOct 20, 2026 · metrics 2.10.0
npm
tofu-tf/tofu
Functional programming toolbox
Apache-2.0Oct 19, 2026 · metrics 2.10.0
npm
Nick2bad4u/eslint-plugin-immutable-2
ESLint plugin to disable all mutation in JavaScript and Typescript... 2
MITSep 18, 2026 · metrics 2.10.0
RubyGems
dry-rb/dry-monads
Useful, common monads in idiomatic Ruby
MITSep 10, 2026 · metrics 2.10.0
npm
zrosenbauer/massaman
Functional programming utilities for TypeScript. Result types, pattern matching, async pipelines.
MITOct 1, 2026 · metrics 2.10.0