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Functional GitHub Repositories (2026) · Open Source Tools

Discover the best Functional open source repositories on GitHub. Explore trending tools, live star counts, source code, and developer projects updated daily.

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7 matching projects · updated Nov 12, 2026 How we rank ↗

#1 TRENDING charmbracelet/bubbletea Go 2020

A powerful little TUI framework 🏗

◇ cli ◇ elm-architecture ◇ framework ◇ functional

3.2K ↑ +105 today

#2 TRENDING apple/pkl Java 2024

A configuration as code language with rich validation and tooling.

◇ config ◇ configuration ◇ data ◇ functional

418 ↑ +7 today

#3 TRENDING kcl-lang/kcl Rust 2022

KCL Language Core and API

◇ cloud-native ◇ compiler ◇ configuration ◇ configuration-language

177 ↑ +6 today

#4 TRENDING dy/jz JavaScript 2024

JS to WASM compiler

◇ aot ◇ assemblyscript ◇ audio ◇ audio-worklet

9 ↑ +1 today

#5 TRENDING remeda/remeda TypeScript 2018

A utility library for JavaScript and TypeScript.

◇ functional ◇ programming ◇ typescript ◇ utility

173 ↑ +1 today

#6 TRENDING akarnokd/kotlin-flow-extensions Kotlin 2019

Extensions to the Kotlin Flow library.

◇ async ◇ continuation ◇ coroutines ◇ extensions

19 ↑ +1 today

#7 TRENDING pen-lang/pen Rust 2021

The parallel, concurrent, and functional programming language for scalable software development

◇ concurrency ◇ functional ◇ go ◇ language

8 ↑ +1 today

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