Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Underline.js is like underscore.js but using modern ES7 syntax launched in 2016; newer entries below may have overtaken it.

1. 1UJ
   Underscore.js for Objective-C▲120

   2012 · underscorem.org · its alternatives →

2. 2
   Underline.js – pushing the boundary of web typography▲7

   Pushing the boundary of browser typography rendering! - wentin/underlineJS

   2015 · github.com · its alternatives →

3. 3
   A command-line utility-belt for hacking JSON and Javascript▲68

   Command-line utility-belt for hacking JSON and Javascript. - GitHub - ddopson/underscore-cli at hn

   2012 · github.com · its alternatives →

4. 4UT
   Under the hood ReactJS▲266

   Entire React code base explanation by visual block schemes (Stack version)

   2017 · bogdan-lyashenko.github.io · its alternatives →

5. 5GJ
   G9.js – Automatically Interactive Differentiable Graphics▲237

   2016 · omrelli.ug · its alternatives →

6. 6
   JS Syntax▲8

   JavaScript newer syntax(ES6+) detection

   2025 · js-syntax.com · its alternatives →

7. 7
   Remarkable▲82

   a JavaScript Markdown and Commonmark parser

   2014 · github.com · its alternatives →

8. 8
   Dak – a Lisp-like language that transpiles to JavaScript▲94

   Hi HN, author here. Happy to answer any questions. I had an itch to make a lisp like language that was a thin layer on top JavaScript. Something that could leverage the thriving ecosystem that exists around JavaScript. It's brittle, hot off the oven. Besides being a fan of parenthesis, I think macros fill in a gap that the JavaScript ecosystem today fills in with one-off compilers, bundler plugins and such. Macros can't do everything, but for example I think they have the potential to enable things like JSX, Solid and Svelte style libraries. Take the tour to get a feel for what it can do and…

   2023 · daklang.com · its alternatives →

9. 9
   My winter project, BlockLike.js, an educational JavaScript library▲35

   2018 · blocklike.org · its alternatives →

10. 10
    Eslisp – Minimal JavaScript S-expression syntax and macro system▲51

    un-opinionated S-expression syntax and macro system for JavaScript - anko/eslisp

    2015 · github.com · its alternatives →

11. 11
    JavaScript Transducers with Underscore API▲19

    :raising_hand: Transducers Inspired by Underscore. Contribute to kevinbeaty/underarm development by creating an account on GitHub.

    2014 · github.com · its alternatives →

12. 12JE
    JavaScript, ES6, ES7, ES10 Where Are We?▲33

    2019 · medium.com · its alternatives →

13. 13
    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 →

14. 14
    Exploring ES6▲55

    Upgrade to the next version of JavaScript

    2015 · leanpub.com · its alternatives →

15. 15
    6to5 – Turn ES6 code into vanilla ES5 with source maps and no runtime▲48

    🐠 Babel is a compiler for writing next generation JavaScript. - babel/babel

    2014 · github.com · its alternatives →

16. 16
    js-features▲5

    All JS features under on roof.

    2015 · its alternatives →

17. 17
    Eloquent Javascript▲20

    A modern introduction to Javascript

    2014 · eloquentjavascript.net · its alternatives →

18. 18
    Polished js▲6

    A lightweight toolset for writing styles in JavaScript

    2017 · polished.js.org · its alternatives →

19. 19
    VS Code extension to help learn JavaScript syntax▲6

    2021 · marketplace.visualstudio.com · its alternatives →

20. 20
    Bad Language: A lisp-looking language with interpreter and JS compiler▲6

    A lisp-looking language with interpreter and compiler to JS - mcapodici/badlanguage

    2018 · github.com · its alternatives →

21. 21
    Craft.js – A React framework to build any page editor▲26

    🚀 A React Framework for building extensible drag and drop page editors - prevwong/craft.js

    2020 · github.com · its alternatives →

22. 22AV
    A vanilla JavaScript alternative to the buggy vh/vw CSS units▲8

    2015 · joaocunha.github.io · its alternatives →

23. 23
    Next.js▲19

    A small framework for server-rendered universal JS webapps

    2016 · vercel.com · its alternatives →

24. 24
    Editor.js – the new open-source editor with clean JSON output▲11

    Free block-style editor with a universal JSON output

    2019 · codex.so · 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 →