Life & fun · alternatives · 2026

Wu.js is a JavaScript library that provides higher order functions like map, filter, and reduce for ECMAScript 6 iterators. It enables developers to work with streams of data using lazy and infinite sequences. The… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Wu.js – Higher order functions for ES6 iterators launched in 2014; newer entries below may have overtaken it.

1. 1AJ
   Algebra.js – Build, display, and solve algebraic equations▲132

   2015 · algebra.js.org · its alternatives →

2. 2WJ
   Wiv.js – A library for a more wiggly div▲265

   2018 · jjkaufman.github.io · its alternatives →

3. 3
   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 →

4. 4
   Mizu.js – Lightweight HTML templating library for any-side rendering▲225

   Hey HN, I'd like to share a fun project I've been working on: mizu.js. It's a js library that add functional attributes support into your html, designed to be a simple and flexible alternative to fully-fledged web frameworks (such as Vue, React, and Angular), while offering more capabilities than other lightweight options (like Alpine.js and htmx). As it's written using modern ES features and due to its isomorphic nature, it can be run in both browsers and runtimes (Node, Deno, Bun) without any changes. This makes it ideal for client-side and server-side rendering, as well as static site…

   2024 · mizu.sh · its alternatives →

5. 5OA
   OxJS - a JavaScript Library for Web Applications▲44

   2012 · oxjs.org · its alternatives →

6. 6
   s3-lambda – Lambda functions over S3 objects: each, map, reduce, filter▲177

   Lambda functions over S3 objects with concurrency control (each, map, reduce, filter) - littlstar/s3-lambda

   2017 · github.com · its alternatives →

7. 7
   es6_maps, new Elixir syntax feature via runtime compiler hacking▲71

   Hi HN! I thought you might enjoy this even if you don't know much about Elixir. `es6_maps` is a small library that introduces a "shorthand" map creation syntax, similar to shorthand object construction in JavaScript/TypeScript. For those unfamiliar with Elixir, the most interesting aspect might be how it achieves this. `es6_maps` takes advantage of BEAM (Erlang's VM) hot-reload capabilities to amend the Elixir compiler bytecode at runtime, adding functions that expand the shorthand syntax for further compilation. I think it's a nice showcase of the power you can wield (with care) when…

   2024 · github.com · its alternatives →

8. 8
   JAQT – JavaScript Queries and Transformations▲100

   Hi all, I've made a javascript library to simplify searching/sorting/filtering in arrays of objects. Its inspired by both GraphQL and SQL, but implemented using javascript Proxies. Instead of creating a new language, its all just javascript. I've made it as part of an experimental database, which uses javascript as the query engine. The normal javascript map/reduce/sort functions are quite difficult to master for junior developers. JAQT is easier to explain, and can still be used in combination with any existing array functions. Please let me know what you think of the…

   2024 · github.com · its alternatives →

9. 9AL
   A library to record and intercept JavaScript at runtime▲118

   2017 · maierfelix.github.io · its alternatives →

10. 10
    A JavaScript function that looks and behaves like a pipe operator▲120

    A pipe-like function to verticalize your JavaScript code - laurentpayot/verticalize

    2023 · github.com · its alternatives →

11. 11GJ
    garlic.js - don't let your users lose their form data▲212

    2012 · guillaumepotier.github.com · its alternatives →

12. 12
    Advanced Mathematics Library for Node.js and JavaScript▲123

    Advanced Mathematics Library for Node.js and JavaScript - numbers/numbers.js

    2012 · github.com · its alternatives →

13. 13
    Miso – A Haskell implementation of Elm▲114

    :ramen: A tasty Haskell web and mobile framework. Contribute to dmjio/miso development by creating an account on GitHub.

    2017 · github.com · its alternatives →

14. 14
    Umbrella JS, a 2.5kb jQuery alternative▲132

    :umbrella: Lightweight javascript library for DOM manipulation and events

    2018 · umbrellajs.com · its alternatives →

15. 15GJ
    G9.js – Automatically Interactive Differentiable Graphics▲237

    2016 · omrelli.ug · its alternatives →

16. 16
    Lfi – a lazy functional sync, async, and concurrent iteration library▲98

    Hey HN! Roughly 4 years ago I started building a lazy functional iteration library for JS/TS. I had a few goals for the library: - Supporting sync, sequential async, and concurrent async iteration - Limiting it to a small number of orthogonal concepts that compose beautifully to solve problems - Making it fully tree-shakeable I built it for myself and have (mostly) been its only user as I refined it. I've used it in lots of personal projects and really enjoyed it. I recently decided it would be nice to spread that enjoyment so I created a documentation website complete with a playground…

    2024 · lfi.dev · its alternatives →

17. 17
    Jax-JS, array library in JavaScript targeting WebGPU▲84

    JAX in pure JavaScript, as a flexible machine learning library and compiler.

    Jan 2026 · ss.ekzhang.com · its alternatives →

18. 18
    Leporello.js – interactive functional programming IDE for JavaScript▲107

    Hi! Leporello.js is an interactive functional programming environment designed for pure functional subset of JavaScript. It executes code instantly as you type and displays results next to it. Leporello.js also features an omnipresent debugger. Just position your cursor on any line or select any expression, and immediately see its value. Leporello.js visualizes a dynamic call tree of your program. Thanks to the data immutability in functional programming, it allows you to navigate the call tree both forward and backward, offering a time-travel-like experience. Leporello.js offers the ability…

    2023 · leporello.tech · its alternatives →

19. 19
    Faster.js – a micro-optimizing JavaScript compiler▲89

    faster.js is a Babel plugin that compiles idiomatic Javascript to faster, micro-optimized Javascript. - vzhou842/faster.js

    2018 · github.com · its alternatives →

20. 20
    Blasjs – Pure Javascript implementation of BLAS▲68

    2018 · github.com · its alternatives →

21. 21
    FilterQL – A tiny query language for filtering structured data▲77

    Hey all, I just released v2.0.0 of FilterQL, a query language and TypeScript library. This version adds support for Operations, which allow you to transform the data after filtering. If you think this would be useful in a project you're working on, give it a try and let me know what you think!

    2025 · github.com · its alternatives →

22. 22
    Matches.js -- Powerful Pattern Matching for Javascript▲96

    Powerful pattern matching for Javascript. Contribute to natefaubion/matches.js development by creating an account on GitHub.

    2012 · github.com · its alternatives →

23. 23
    A Fast, Malloc-Free C++14 Json Parser and Encoder▲98

    Meta programming utilities for C++14. Merged in matt-42/lithium - matt-42/iod

    2014 · github.com · its alternatives →

24. 24
    Ferrum.js – Rust features in JS: traits and advanced iteration▲63

    Features from the rust language in javascript: Provides Traits/Type classes & a hashing infrastructure and an advanced library for working with sequences/iterators in js - adobe/ferrum

    2019 · 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 →