Top 253 functional open source projects

An extremely small, intuitive and fast functional utility library for JavaScript

⚡️ λ PHP functional library focused on simplicity and performance

🎧 Simple React functional setState

Modern modular library for building web applications

WebExtension for Buku

A tiny concatenative programming language and shell

Flow is a Swift library for working with asynchronous flows and life cycles

Async/await reactive tools for Python 3.9+

A functional-first toolkit for building brilliant ASP.NET Core applications using F#.

Functional Extensions Library for JavaScript

A static, type inferred and embeddable language written in Rust.

KOIN - a concise and pragmatic dependency injection framework for Kotlin -- #Samples

A parser combinator library written in the Swift programming language.

🔥Deep Waters is an easy-to-compose functional validation system for javascript developers 🔥

Wadler's "A prettier printer" embedded pretty-printer DSL for Swift

Irken is a statically typed variant of Scheme. Or a lisp-like variant of ML.

An Elm to OCaml compiler

Partial application syntax and lambda parameters for JavaScript, inspired by Scala's `_` & Kotlin's `it`

The Chaos Programming Language

A Compiler for the Popr Language

Customizable, functional css utilities

🇨🇭Functional custom elements

A functional music theory library for Javascript

A lightweight state container based on Redux

The Disco Discus Compiler

[not actively maintained!] A standard library for functional programming in JavaScript

🍃 Kotlin Spring 5 Webflux functional application with api request validation and interactive api doc

A purely functional JSON library for Kotlin built on Λrrow

145+ extra higher-level functional tools beyond standard library's `itertools`, `functools`, etc. and popular third-party libraries like `toolz`.

c++ LINQ -like library of higher-order functions for data manipulation

"A collection of functional programming libraries that can be composed together. Unlike a framework, thi.ng is a suite of instruments and you (the user) must be the composer of. Geared towards versatility, not any specific type of music." — @loganpowell via Twitter

A complete set of primitives for concurrency and reactive programming on Swift

Functional plumbing for Python

Composable, purely functional healthchecks in Scala.

Most.js based middleware for Redux. Handle async actions with monadic streams & reactive programming.

Flexible and powerful universal routing solution

Eclipse Collections is a collections framework for Java with optimized data structures and a rich, functional and fluent API.

🐏 Lisp that compiles to JavaScript in the Ramda way

Lightweight curried functional programming library

The TypeScript Standard Library

Minimal http4s + Doobie + ZIO + Circe Scala application to show how to build a purely functional web application in Scala.

Replace boilerplate code with functional patterns using 'go generate'

🧙 ‎‎ A 3D game about functional programming patterns. Uses PureScript Native, C++, and Panda3D.

Idiomatic Ruby hash transformations

🎑 Watermarking for the browser

An insanely simple self-hosted functional programming language

Exemplary real world application built with Effector + React

Persistent/Immutable/Functional data structures for Python

⚗️ Functional JSON Parser - Linux Ready 🐧

Pragmatic and concise state management.

A statically-typed, functional and reactive framework for modern browsers

Functional style JSON parsing in Kotlin

A utility for working with nested data structures.

Cross-platform CRON expression parsing for Scala

StoreKit library for RxSwift

A lightweight CSS library.

👏 Microscopic & functional event emitter in ~350 bytes, extensible through plugins.

Functional Experiment in Golang

funcy.js - a functional web components wrapper

Effortless React State Management.