Life & fun · alternatives · 2026

24 alternatives to And then...

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

And Then is a CommonJS promises library designed for developers who need asynchronous programming tools without unnecessary complexity. It provides parallel execution, fulfillment handling, and exception management… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. And then... launched in 2013; newer entries below may have overtaken it.

1. 1
   Fast 2kB date library alternative to Moment.js with the same API▲122

   ⏰ Day.js 2kB immutable date-time library alternative to Moment.js with the same modern API - iamkun/dayjs

   2018 · github.com · its alternatives →

2. 2AN
   A Node.js stream library that works with promises▲10

   2018 · npmjs.com · its alternatives →

3. 3
   Nub – A Bun-like all-in-one toolkit for Node.js▲277

   Colin here, creator of Nub. I’ve had the general shape of this in mind for years. Nub runs your code with stock `node`, augmented with a `--require` preload hook[0] that adds a transpiler (oxc-powered, packaged as a Node-API add-on), registers a module resolution hook[1], and injects polyfills as needed for APIs like `Worker`, `Temporal`, etc. All purely additive, your code ultimately runs using Node’s actual engine & stdlib implementations. [0] https://nodejs.org/api/cli.html#-require-module [1]…

   Jun 2026 · github.com · its alternatives →

4. 4
   Fast.js – faster reimplementations of native JavaScript functions▲323

   Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js

   2014 · github.com · its alternatives →

5. 5JL
   JS library to make your website instant▲426

   http://instantclick.io/ It seems the internet architecture won't bring us instant websites anytime soon. So here is a hack. I released this JS library last month (today is version 2.0 release, fixing v1.0's rough edges), it makes use of HTML5's pushState and preloading to make a website instant. It works like this: before clicking on a link, you'll hover over it. And there's a delay of 200-300 ms between these two events. InstantClick uses this delay to preload a page, when you click on a link it will display instantly in most case. (You can test on the website.) That's…

   2014 · its alternatives →

6. 6WJ
   Way.js – Simple, persistent, framework-agnostic two-way databinding▲162

   2014 · gwendall.github.io · its alternatives →

7. 7
   Crudlet.js – A common, streamable interface for synchronizing data▲94

   utility library for async iterable iterators. Contribute to crcn/mesh.js development by creating an account on GitHub.

   2015 · github.com · its alternatives →

8. 8
   Waitasecond▲60

   Elegant JavaScript or TypeScript promises

   2023 · github.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. 10WN
    Why Node.js libraries aren't promises by default▲9

    2020 · nickmeldrum.com · its alternatives →

11. 11
    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 →

12. 12
    ClarifyJs – Overcoming Limits of JavaScript Method Chaining▲30

    Create and Execute Chained Javascript Methods In Any Order You want - omidh28/clarifyjs

    2017 · github.com · its alternatives →

13. 13CP
    Clojure parser and core library in JavaScript, live on CodeCombat▲57

    2014 · vickychijwani.github.io · its alternatives →

14. 14
    Cross-browser asynchronous JS script loader w/callbacks▲45

    2012 · github.com · its alternatives →

15. 15
    Faqtor – Promise-based build automation for Node.js▲37

    Promise-based task runner. Easy to use, easy to extend. - faqtor/README.md at master · faqtor/faqtor

    2019 · github.com · its alternatives →

16. 16
    Weird JSON superset with BigInt, Infinity, TypedArray etc▲67

    the JS/Node.JS library for encoding complex and unconventional data structures. Support for BigInts, TypedArrays, null, undefined, and Symbol. Multiple flavors available. - DO-SAY-GO/WeirdJSON

    2020 · github.com · its alternatives →

17. 17
    Xr – A modern ES6 Promise-based XMLHttpRequest wrapper▲32

    Ultra-lightweight wrapper around XMLHttpRequest. You should probably use fetch (whatwg-fetch) or RxJS, though. - radiosilence/xr

    2015 · github.com · its alternatives →

18. 18PV
    Promise Visualization Playground▲61

    2015 · bevacqua.github.io · its alternatives →

19. 19NN
    Nunjucks – Node templates with inheritance, asynchronous control▲43

    2013 · jlongster.github.io · its alternatives →

20. 20
    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 →

21. 21
    Visualising how streaming AJAX speeds up the web▲13

    A streaming approach to JSON. Oboe.js is a Javascript library for Node.js and browsers that speeds up web applications by providing parsed objects before the response completes

    2014 · oboejs.com · its alternatives →

22. 22
    LoadJS – A tiny async loader for modern browsers▲25

    A tiny async loader / dependency manager for modern browsers (961 bytes) - amorey/loadjs

    2016 · github.com · its alternatives →

23. 23DS
    Damn simple and useful promise pool for Node.js▲5

    2020 · npmjs.com · its alternatives →

24. 24
    Nsynjs – JS engine with stoppable threads and without callback hell▲51

    JavaScript engine + state machine with threads and without callbacks - amaksr/nsynjs

    2017 · github.com · 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 →