Life & fun · alternatives · 2026

Teoria.js is a JavaScript library for music theory that enables developers to build music-related applications. It provides tools for working with notes, scales, chords, and intervals directly in code. The library is… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Teoria.js - Music theory for JavaScript launched in 2013; newer entries below may have overtaken it.

1. 1
   Pts.js – A library for visualization and creative coding▲611

   Pts is a javascript library for visualization and creative-coding.

   2018 · ptsjs.org · its alternatives →

2. 2MY
   Make your web page dance with Rythm.js▲183

   2017 · okazari.github.io · its alternatives →

3. 3WP
   Weekend project, Intro.js▲716

   2013 · usablica.github.com · its alternatives →

4. 4
   A small, simple music theory library in C99▲57

   Western music theory library in C. Contribute to thelowsunoverthemoon/mahler.c development by creating an account on GitHub.

   Feb 2026 · github.com · its alternatives →

5. 5
   Ear training using midi.js▲230

   2015 · tonedear.com · its alternatives →

6. 6
   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 →

7. 7
   LightNote▲242

   An interactive site to learn the basics of music theory 🎶

   2016 · lightnote.co · its alternatives →

8. 8FJ
   Forgo.js – a 4kb React alternative based on plain JS and DOM APIs▲110

   2021 · forgojs.org · its alternatives →

9. 9
   Chart.js▲263

   Simple, clean & engaging charts for designers and developers

   2014 · chartjs.org · its alternatives →

10. 10RJ
    Ramjet.js – Morph DOM elements into each other▲309

    2015 · rich-harris.co.uk · its alternatives →

11. 11
    Theory.js – Abstraction layer for cross-platform JavaScript▲28

    Abstraction layer for cross platform JavaScript. Contribute to amark/theory development by creating an account on GitHub.

    2013 · github.com · its alternatives →

12. 12
    CalDOM: An agnostic, reactive and minimalist JavaScript UI library▲107

    An agnostic, reactive & minimalist (3kb) JavaScript UI library with direct access to native DOM.

    2021 · caldom.org · its alternatives →

13. 13HA
    Handel – A procedural programming language for writing songs in browser▲187

    2021 · handel-pl.github.io · its alternatives →

14. 14
    An algorithmic audio landscape▲193

    This is an web audio experiment I've been wanting to do for a long time. Basically an ambient music composition, but all the sound elements are laid out in space, and that musical space can be explored freely. It's definitely inspired by in-world music that sometimes appears in games. I basically took that concept, keeping the music aspect, and dropping the entire "game" aspect. I also turned it into a more "traditional" non-interactive album, but since I started with code, why not program the whole thing? Had a blast making the entire album from code, the complete source for the album is…

    2024 · ambient.garden · its alternatives →

15. 15
    1 KB JavaScript library for building front end apps▲242

    1kB-ish JavaScript framework for building hypertext applications - hyperapp/hyperapp

    2017 · github.com · its alternatives →

16. 16TS
    TinyRave – SoundCloud for JavaScript Music▲68

    2016 · tinyrave.com · its alternatives →

17. 17
    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 →

18. 18
    Muzoti – Algorithmic Music with Web Audio/Midi and VueJS▲93

    2018 · muzoti.com · its alternatives →

19. 19AJ
    Algebra.js – Build, display, and solve algebraic equations▲132

    2015 · algebra.js.org · its alternatives →

20. 20
    Umbrella JS, a 2.5kb jQuery alternative▲132

    :umbrella: Lightweight javascript library for DOM manipulation and events

    2018 · umbrellajs.com · its alternatives →

21. 21
    Danfo.js▲109

    Open Source JavaScript library for manipulating data.

    2020 · github.com · its alternatives →

22. 22
    Total.js Platform▲93

    Open-source JavaScript platform

    2021 · totaljs.com · its alternatives →

23. 23
    Musical Interactions▲104

    Play musical instruments on the web

    2017 · tympanus.net · its alternatives →

24. 24MM
    MeScript, music programming language inspired by Lisp▲25

    Sep 2026 · quadracollision.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 →