Top 780 functional-programming open source projects

🦄🌈🍄 algebraic style composition for functional UIs

Type-safe, statically checked composition of HTTP servers

Discriminated unions, pattern matching and partial applications for C#

The Official Shen Sources

Recursive descent parsing library for Python based on functional combinators

"every time I watch one of his talks I feel like someone has gone in and organized my brain"

Type-safe, functional string formatting in Swift.

Never: statically typed, embeddable functional programming language.

A static single-page application resume-builder developed using React.js and JSON Resume schema (https://suddi.io/)

🥃 Functional Algebraic Data Types

The F# compiler, F# core library, F# language service, and F# tooling integration for Visual Studio

⚡️ λ PHP functional library focused on simplicity and performance

Ink is a minimal programming language inspired by modern JavaScript and Go, with functional style.

Library of utilities for tagless final encoded algebras

cats transformer type classes.

A tiny, fast, unopinionated handler for updating JS objects and arrays immutably

Either and Maybe monads for better error-handling in C++ ↔️

Functional programming in bash

🧮 A research programming language on top of C macros

A porting to TypeScript featuring fp-ts, rxjs6 and React

Automatic code generation for Scala functions and expressions via the Curry-Howard isomorphism

Simple, expressive & portable programming language for efficient scripting

Practice, thinking and reading

[tutorial]A functional, Data Science focused introduction to Python

Jargon from the functional programming world in simple terms!

Pragmatic, balanced FP in JavaScript. @FLJSBook on twitter.

A fancy and practical functional tools

🚀Functional, High performance 3D Webgl Engine

💊 steroids for Xcode Playgrounds

Fast & Functional logger in Scala

Extended code samples related to the book "Domain Modeling Made Functional". Buy the book here: https://pragprog.com/book/swdddf/domain-modeling-made-functional or here https://fsharpforfunandprofit.com/books/

The Eta Programming Language, a dialect of Haskell on the JVM

Bitcoin chart for the terminal as command line util

Dead simple React state management to bring pure components alive

A (more or less) one page introduction to Nix, the language.

An in-progress fast, dependently typed, functional programming language implemented in Swift.

Async/await reactive tools for Python 3.9+

Immutable and Memory-Efficient Maps and Sets in Go

🎱 Composable, transformable, controllable randomness.

Pure programming language

Bitcoin Implementation in Scala

The easy way to learn Scala.

A high-performance, purely-functional library for building, composing, and supervising typed actors based on ZIO

Scala 2 compiler and standard library. For bugs, see scala/bug

C backend for PureScript

Coalton is (supposed to be) a dialect of ML embedded in Common Lisp.

Extraordinary JavaScript framework with unique declarative and functional architecture

Purely Functional Transaction Management In Scala With ZIO

DRAFT outlining some techniques of functional programming

Pleasant, yet principled Scala optics DSL

🔮 A refreshing functional take on deep learning, compatible with your favorite libraries

Categorical Query Language IDE

A python-ish pure and total functional programming language

Data analysis library for JavaScript built with Ramda

Functional programming for Salesforce Apex

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

RemoteData type

A collection of extensions to the ReactiveSwift framework.

Standard ML Compiler and Toolkit

Functional programming and category theory for everyday JavaScript development