Top 23 Function Open-Source Projects

1. serving

   1 9 6,060 9.7 Go

   Kubernetes-based, scale-to-zero, request-driven compute (by knative)

   

   Project mention: This is Cloud Run: A Decision Guide for Developers | dev.to | 2026-03-14

   Cloud Run's API is based on Knative Serving, an open-source project originally started by Google for running serverless workloads on Kubernetes. But Cloud Run is not "managed Knative". It reimplements the Knative Serving API on top of Borg, with no Kubernetes underneath.

2. SaaSHub

   www.saashub.com featured

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

3. uftrace

   2 4 3,439 8.9 C

   Function graph tracer for C/C++/Rust/Python

   

4. gormt

   3 0 2,426 4.1 Go

   database to golang struct

   

5. gomonkey

   4 1 2,257 2.3 Go

   gomonkey is a library to make monkey patching in unit tests easy

   

6. funky

   5 2 669 0.0 Python

   Funky takes shell functions to the next level by making them easier to define, more flexible, and more interactive.

   

7. function2

   6 8 601 3.3 C++

   Improved and configurable drop-in replacement to std::function that supports move only types, multiple overloads and more

   

8. keyboard-function-keys-linux

   7 6 338 0.8

   A small script to allow various keyboards to boot up with function keys enabled by default.

   

9. functional

   8 4 202 4.6 PHP

   PHP Functional Programming library. Monads, common use functions and generic collections.

   

10. Throttler

    9 0 166 5.9 Swift

    One Line to throttle, debounce and delay: Say Goodbye to Reactive Programming such as RxSwift and Combine. (by boraseoksoon)

    

11. fnts

    10 2 84 6.2 TypeScript

    λ Minimal Functional Programming Utilities for TypeScript & JavaScript

    

12. closure

    11 2 52 4.8 C++

    A c++ function closure implementation. It integrates the std::function and std::bind, and even more powerful. (by coyorkdow)

    

13. PartialFunctions.jl

    12 1 51 6.5 Julia

    A small package to simplify partial function application

    

14. static-functional

    13 1 48 0.0 C++

    Header-only C++ library providing compile-time functional operators that work with raw function pointers

    

15. alto

    14 1 41 9.5 Python

    Serverless for data practitioners. The fastest ⚡️ way to run your code in the cloud. Effortlessly run scripts, functions, and Jupyter notebooks in virtual machines. (by runprism)

    

16. py2gpt

    15 1 29 7.4 Python

    Convert Python code into JSON consumable by OpenAI's function API.

    

17. cdc

    16 2 24 4.9 Shell

    ☣️ Shell plugin for zsh/bash that allows you to cd to subdirectories of user-defined directories from anywhere, without editing CDPATH.

    

18. FsFediverseArchive

    17 1 14 4.6 F#

    A Set of Google Cloud Functions Written in F# to archive some of my fediverse activity

    

19. polyvariadic

    18 0 11 0.0 Haskell

    Create and apply polyvariadic functions

    

20. memofy

    19 2 7 7.6 TypeScript

    Prevents re-execution of large javascript functions that have been processed once with the same parameter.

    

21. with-local-tmp-dir

    20 1 6 6.4 TypeScript

    Creates a temporary folder inside cwd, cds inside the folder, runs a function, and removes the folder. Especially useful for testing.

    

22. mulle-atexit

    21 1 5 6.3 C

    👼 Compatibility library to fix deficient atexit implementations

    

23. FileMover

    22 1 5 0.0 Python

    This script written in Python lets user to move extension-specific files from Folder A to Folder B.

    

24. chute

    23 3 5 7.2 JavaScript

    Use dot-notation as a pipeline operator in JavaScript. A function to chain and send data through any mix of normal functions and methods. ~10KB (~4KB minified). Since 2024. (by gregabbott)

    

    Project mention: Working pipe operator today in pure JavaScript | news.ycombinator.com | 2025-10-04

    https://github.com/gregabbott/chute

    In a similar way to the featured project, Chute also uses proxies to work like a pipeline operator. But like in your reply, Chute uses a dot-notation style to chain and send data through a mix of functions and methods.

    You might like to see how Chute uses proxies, as it requires no `chainWith` setup step before use. Without setup, Chute can send data through global or local, top-level or nested, native or custom, unary, curried or non-unary functions and methods. It gives non-unary functions the current data at a specific argument position by using a custom-nameable placeholder variable.

    The Chute page describes some more of its features:

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