289 Open source projects that are alternatives of or similar to Folktale

A type-safe and space-efficient sum type for C# (comparable to discriminated unions in C or C++)

Generic immutable recursive data representation API targeted at source code models and more.

funcy.js - a functional web components wrapper

Algebraic data types for Python (experimental, not actively maintained)

Examples and exercises from the blog series

StoreKit library for RxSwift

Replace boilerplate code with functional patterns using 'go generate'

Fast and memory-efficient immutable collections and helper data structures

Flexible and powerful universal routing solution

📐 Javascript Geometric Algebra Generator for Javascript, c++, c#, rust, python. (with operator overloading and algebraic literals) -

⚗️ Functional JSON Parser - Linux Ready 🐧

Functional programming style pattern-matching library for C++

A utility for working with nested data structures.

The TypeScript Standard Library

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

Composable, purely functional healthchecks in Scala.

A Virtual DOM based templating-engine for PHP

Idiomatic Ruby hash transformations

A reactive programming library for JavaScript.

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

Suave is a simple web development F# library providing a lightweight web server and a set of combinators to manipulate route flow and task composition.

Exemplary real world application built with Effector + React

[READONLY] Library for implementing function call chains

Principled schema system for JSON. Work in progress.

Fun with λ calculus!

Pragmatic and concise state management.

⚡️ Functionally create DOM elements and compose them to a tree quickly

Functional style JSON parsing in Kotlin

Lightweight curried functional programming library

Cross-platform CRON expression parsing for Scala

Functional plumbing for Python

A lightweight CSS library.

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

Functional Experiment in Golang

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

Effortless React State Management.

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

Algebraic data types in Common Lisp

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

React functional CSS-in-JS

🎑 Watermarking for the browser

Specification for interoperability of common algebraic structures in JavaScript

Reusable, composable patterns across Elixir libraries

A new Unix shell.

An insanely simple self-hosted functional programming language

RequestVia: A Functional HTTP Client That Wraps Net::HTTP

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

Ramda + Ramda Fantasy + Sanctuary REPL 🌿

Persistent/Immutable/Functional data structures for Python

Functional 3d graphics library

"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 friendly kotlin library to validate API endpoints using an OpenApi 3.0 and Swagger 2.0 specification

pure functional and generic programming for Erlang

PyPika is a python SQL query builder that exposes the full richness of the SQL language using a syntax that reflects the resulting query. PyPika excels at all sorts of SQL queries but is especially useful for data analysis.

🐏 Lisp that compiles to JavaScript in the Ramda way

Functional visual programming environment

Functional programming in Java

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

A purely functional JSON library for Kotlin built on Λrrow

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