Dev tools · 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. Space Rock, a realtime JavaScript framework launched in 2015; newer entries below may have overtaken it.

1. 1
   Odyssey 3▲159

   A world model that simulates physics in real time

   14d ago · odyssey.systems · its alternatives →

2. 2
   NotebookJS▲109

   Scientific computation for JavaScript

   2016 · datazar.com · its alternatives →

3. 3
   Eloquent Javascript▲20

   A modern introduction to Javascript

   2014 · eloquentjavascript.net · its alternatives →

4. 4PM
   Practical Modern JavaScript▲7

   2017 · ponyfoo.com · its alternatives →

5. 5
   Razorframe▲5

   a Node.js library for kickstarting real-time apps at scale

   2016 · github.com · its alternatives →

6. 6OP
   Object Playground - The definitive guide to object-oriented JavaScript▲5

   2013 · objectplayground.com · its alternatives →

7. 7
   Windsock.js – A flux inspired library for building web applications▲6

   2016 · github.com · its alternatives →

8. 8
   Nullstack – A framework for full stack JavaScript components▲7

   2023 · nullstack.app · its alternatives →

9. 9JM
   Jindo – minimalist reactive backend for JavaScript applications▲7

   2016 · jindo.io · its alternatives →

10. 10ET
    engine262 - the self-hosted JavaScript engine▲5

    2019 · engine262.js.org · its alternatives →

11. 11RA
    Roadroller, a heavyweight packer for large JavaScript demos▲6

    2021 · lifthrasiir.github.io · its alternatives →

12. 12TA
    Tweed – An OO JavaScript VDOM UI Library▲5

    2017 · medium.com · its alternatives →

13. 13
    Monkberry▲6

    A JavaScript library for building web user interfaces

    2016 · monkberry.js.org · its alternatives →

14. 14TW
    The Web Synthetizer from Space▲8

    2017 · synthfrom.space · its alternatives →

15. 15
    Unobtrusive JavaScript framework for server-side applications▲6

    2017 · unpoly.com · its alternatives →

16. 16
    Polished js▲6

    A lightweight toolset for writing styles in JavaScript

    2017 · polished.js.org · its alternatives →

17. 17QT
    Quokka – The Live Scratchpad for JavaScript▲8

    2017 · medium.com · its alternatives →

18. 18
    Simple framework for JavaScript apps▲7

    2019 · github.com · its alternatives →

19. 19JA
    JSK – A community of experienced avid JavaScript programmers▲5

    2015 · javascriptkicks.com · its alternatives →

20. 20AP
    AllJS – Popular JavaScript libraries ready for tinkering▲6

    2015 · alljs.net · its alternatives →

21. 21BB
    Bit-bundler – simplify the JavaScript bundling experience▲6

    2017 · bundler.bitjs.io · its alternatives →

22. 22
    Natto – a canvas for writing and manipulating JavaScript▲5

    2021 · natto.dev · its alternatives →

23. 23
    SpatialOS - Public Beta▲12

    A platform for building games of ‘unprecedented size’

    2017 · its alternatives →

24. 24
    Curveball, a microframework in TypeScript with AWS Lambda support▲7

    2020 · evertpot.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 →