Life & fun · alternatives · 2026

24 alternatives to Async Transducers with Promises

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Async Transducers with Promises launched in 2014; newer entries below may have overtaken it.

1. 1LP
   Literate Programming Implementation of the Promises/A+ Standard▲6

   2015 · thriqon.github.io · its alternatives →

2. 2DS
   Damn simple and useful promise pool for Node.js▲5

   2020 · npmjs.com · its alternatives →

3. 3
   Kneden – Transpile ES7 Async/await to ES6 Promise Chains (Babel Plugin)▲76

   Transpile ES2017 async/await to vanilla ES6 Promise chains: a Babel plugin - babel/kneden

   2016 · github.com · its alternatives →

4. 4
   A 12 line library for writing readable code with `await`▲6

   A javascript library for making await more functional - craigmichaelmartin/fawait

   2019 · github.com · its alternatives →

5. 5
   Async UI: A Rust UI Library Where Everything is a Future▲173

   2022 · wishawa.github.io · its alternatives →

6. 6AN
   A Node.js stream library that works with promises▲10

   2018 · npmjs.com · its alternatives →

7. 7
   Waitasecond▲60

   Elegant JavaScript or TypeScript promises

   2023 · github.com · its alternatives →

8. 8WN
   Why Node.js libraries aren't promises by default▲9

   2020 · nickmeldrum.com · its alternatives →

9. 9
   Cancelable async primitives for JavaScript▲84

   Composable async primitives with cancelation, control over scheduling, and coroutines. Superior replacement for JS Promises. - mitranim/posterus

   2017 · github.com · its alternatives →

10. 10SA
    Starlette – An asyncio Web framework for Python▲8

    2018 · starlette.io · its alternatives →

11. 11
    And then...▲14

    A minimal CommonJS promises library with useful things like parallel execution, fulfilments and exception handling, while retaining the beautiful simplicity of .then(). - askabt/andthen

    2013 · github.com · its alternatives →

12. 12
    Code Podcast 3: Concurrency – Event Loop & Coroutines▲54

    Concurrency in UIKits, browsers and web servers

    2016 · soundcloud.com · its alternatives →

13. 13
    Await-Tree – Visualize Async Rust Task Execution in Real-Time▲28

    Generate accurate and informative tree dumps of asynchronous tasks. - risingwavelabs/await-tree

    2025 · github.com · its alternatives →

14. 14
    LazyPromise = Observable – Signals▲34

    A Promise-like primitive which is lazy/cancelable, has typed errors, and emits synchronously instead of on the microtask queue. In a way LazyPromise is what you get if you take an Observable and make it impossible to misuse it for what the Signals were built to do.

    Dec 2025 · github.com · its alternatives →

15. 15
    AsyncNinja▲5

    Concurrency library for Swift

    2016 · async.ninja · its alternatives →

16. 16
    Then▲3

    Elegant Async Code in Swift

    2016 · github.com · its alternatives →

17. 17
    Promise.allSettled Alternative with Concurrency Support▲5

    A year ago, I built this package but never shared it with any community. Sharing here in case this helps you in the future. However, if you like, don't forget to give a star and drop your feedback

    2025 · github.com · its alternatives →

18. 18KT
    KillerTask: the solution to AsyncTask implementation (in Kotlin)▲5

    2016 · inaka.net · its alternatives →

19. 19CF
    Conduit for C++: Lazy Sequences Using the Coroutine TS▲7

    2018 · medium.com · its alternatives →

20. 20
    Async/await alternative▲17

    an extendable library that can wait for stuff to happen in a synchronous-but-not-blocking manner - uri-chandler/wait-for-stuff

    2016 · github.com · its alternatives →

21. 21
    Swimmer▲2

    An async task pooling and throttling utility for JS

    2018 · github.com · its alternatives →

22. 22
    JS Brain Teasers▲8

    Learn the javascript event loop in a new and fun way

    2025 · jsbrainteasers.com · its alternatives →

23. 23
    Promisees▲4

    Promise visualization playground for the adventurous

    2015 · bevacqua.github.io · its alternatives →

24. 24CR
    Curio + Requests: Async HTTP for Humans The same taste as Requests▲5

    https://github.com/guyskk/curequests $ pip install curequests

    2017 · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →