Top 23 Coroutine Open-Source Projects

1. Swoole

   1 37 18,878 9.4 C++

   🚀 Coroutine-based concurrency library for PHP

   

   Project mention: How to Build a Real-Time Chat App with WebSockets (And Why It Works) | dev.to | 2026-03-19

   PHP can handle WebSockets. Projects like Ratchet and Swoole exist for exactly this reason. The traditional PHP execution model — spin up a process per request, run the script, die — doesn't naturally fit persistent connections. But the ecosystem has evolved.

2. SaaSHub

   www.saashub.com featured

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

   

3. kotlinx.coroutines

   2 63 13,771 4.8 Kotlin

   Library support for Kotlin coroutines

   

   Project mention: Modern concurrency approaches on the JVM: Coroutines and Loom | dev.to | 2026-06-02

   A coroutine is a lightweight thread that is managed by the Kotlin runtime. Coroutines were initially proposed in Kotlin version 1.1 M01, released in 2017. The first stable version was released with Kotlin 1.3 one year later.

4. Coil

   3 12 11,813 9.4 Kotlin

   Image loading for Android and Compose Multiplatform.

   

5. Pokedex

   4 7 8,328 8.9 Kotlin

   🗡️ Pokedex demonstrates modern Android development with Hilt, Material Motion, Coroutines, Flow, Jetpack (Room, ViewModel) based on MVVM architecture.

   

6. Kategory

   5 33 6,552 9.3 Kotlin

   The perfect companion for your Kotlin journey - Inspired by functional, data-oriented and concurrent programming (by arrow-kt)

   

7. gevent

   6 6 6,439 8.7 Python

   Coroutine-based concurrency library for Python

   

8. tbox

   7 6 5,112 9.0 C

   🎁 A glib-like multi-platform c library

   

9. awesome-asyncio

   8 3 5,082 3.5

   A curated list of awesome Python asyncio frameworks, libraries, software and resources

   

10. Amp

    9 5 4,416 5.0 PHP

    A non-blocking concurrency framework for PHP applications. 🐘

    

    Project mention: Parallel Branches in Neuron AI Workflow | dev.to | 2026-05-05

    If you want the branches to actually run at the same time, you need the AsyncExecutor, which is built on Amp:

11. cppcoro

    10 24 3,829 0.0 C++

    A library of C++ coroutine abstractions for the coroutines TS

    

12. apps-android-wikipedia

    11 3 2,947 9.9 Kotlin

    📱The official Wikipedia app for Android!

    

13. userver

    12 6 2,907 9.9 C++

    Production-ready C++ Asynchronous Framework with rich functionality

    

    Project mention: Came across the async framework userver 3.0 recently – they've moved to C++20 | news.ycombinator.com | 2026-05-28

14. Kotlin-Coroutines-and-Flow-UseCases-on-Android

    13 3 2,873 6.2 Kotlin

    🎓 Learning Kotlin Coroutines and Flows for Android by example. 🚀 Sample implementations for real-world Android use cases. 🛠 Unit tests included!

    

15. concurrencpp

    14 17 2,751 0.0 C++

    Modern concurrency for C++. Tasks, executors, timers and C++20 coroutines to rule them all

    

16. awesome-android-kotlin-apps

    15 0 2,702 8.7 Kotlin

    👓 A curated list of awesome android kotlin apps by open-source contributors.

    

17. Splitties

    16 3 2,585 6.2 Kotlin

    A collection of hand-crafted extensions for your Kotlin projects.

    

18. taskr

    17 0 2,545 0.0 JavaScript

    A fast, concurrency-focused task automation tool.

    

19. may

    18 17 2,391 6.7 Rust

    rust stackful coroutine library

    

20. Foodium

    19 0 2,322 1.0 Kotlin

    🍲Foodium is a sample food blog Android application 📱 built to demonstrate the use of Modern Android development tools - (Kotlin, Coroutines, Flow, Dagger 2/Hilt, Architecture Components, MVVM, Room, Retrofit, Moshi, Material Components).

    

21. async_simple

    20 3 2,180 6.5 C++

    Simple, light-weight and easy-to-use asynchronous components

    

22. CatchUp

    21 1 2,095 9.7 Kotlin

    An app for catching up on things.

    

23. umka-lang

    22 20 2,050 9.0 C

    Umka: a statically typed embeddable scripting language

    

    Project mention: Umka: A statically typed embeddable scripting language | news.ycombinator.com | 2026-05-06

24. less_slow.cpp

    23 11 1,913 9.4 C++

    Playing around "Less Slow" coding practices in C++ 20, C, CUDA, PTX, & Assembly, from numerics & SIMD to coroutines, ranges, exception handling, networking and user-space IO

    

    Project mention: Processing Strings 109x Faster Than Nvidia on H100 | news.ycombinator.com | 2025-09-19

    Yes, at the scale of 128-bit registers NEON is mostly enough, except for a few categories of instructions missing in that ISA subset, like scatter/gather ops, that can yield 30% boost over serial memory accesses: https://github.com/ashvardanian/less_slow.cpp/releases/tag/v...

Coroutines related posts

• Modern concurrency approaches on the JVM: Coroutines and Loom

  2 projects | dev.to | 2 Jun 2026

• Came across the async framework userver 3.0 recently – they've moved to C++20

  1 project | news.ycombinator.com | 28 May 2026

• MultiPlayer Tic-Tac-Toe with WebSocket in PHP

  2 projects | dev.to | 17 May 2026

• Show HN: Writing a C++20M:N Scheduler from Scratch (EBR, Work-Stealing)

  2 projects | news.ycombinator.com | 17 Feb 2026

• Show HN: C discrete event SIM w stackful coroutines runs 45x faster than SimPy

  3 projects | news.ycombinator.com | 3 Feb 2026

• Building a Durable Execution Engine with SQLite

  3 projects | news.ycombinator.com | 21 Nov 2025

• Minicoro: Single header stackful cross-platform coroutine library in pure C

  1 project | news.ycombinator.com | 14 Nov 2025
• A note from our sponsor - SaaSHub
  www.saashub.com | 7 Jun 2026

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