What are the best Functional Programming repositories on GitHub?

The top-ranked Functional Programming open source repositories include tonivade/purefun, ciren/cilib, takapi327/ldbc, tracked and evaluated by community adoption, stars, and code commits.

How do I find trending Functional Programming open source tools?

Browse this curated Functional Programming directory to monitor real-time GitHub star velocity, latest code releases, and rising developer tools updated daily.

Are Functional Programming GitHub repositories free and open source?

Most Functional Programming projects listed here are distributed under open source licenses (such as MIT, Apache 2.0, or GPL). Always check individual project repositories for exact license terms.

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Functional Programming GitHub Repositories (2026) · Open Source Tools

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

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

#21 TRENDING tonivade/purefun Java 2018

Functional Programming library for Java

◇ effects ◇ experimental ◇ free-monad ◇ functional-programming

5 ↑ +1 today

139

#22 TRENDING ciren/cilib Scala 2009

Typesafe, purely functional Computational Intelligence

◇ cilib ◇ computational-intelligence ◇ functional-programming ◇ machine-learning

98 ↑ +1 today

125

#23 TRENDING takapi327/ldbc Scala 2023

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.

◇ cats-effect ◇ cats-effect-3 ◇ database ◇ dotty

6 ↑ +1 today

110