Life & fun · alternatives · 2026

24 alternatives to Odyssey 3

A world model that simulates physics in real time

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   PixelSpace▲68

   A tediously accurate scale model of the solar system

   2014 · joshworth.com · its alternatives →

2. 2SR
   Space Rock, a realtime JavaScript framework▲7

   2015 · space-rock.meteor.com · its alternatives →

3. 3
   The Fabric of Reality: The Science of Parallel Universes▲53

   Evolution, Theoretical Physics and Computer Science

   2015 · amazon.com · its alternatives →

4. 4ST
   Solaris the Thinking Ocean Simulator▲7

   Solaris - a real-time WebGL simulation of Lem

   Jun 2026 · solaris.franzai.com · its alternatives →

5. 5
   NotebookJS▲109

   Scientific computation for JavaScript

   2016 · datazar.com · its alternatives →

6. 6
   Designing Virtual Worlds▲61

   The most comprehensive treatment of virtual world design

   2015 · amazon.com · its alternatives →

7. 7
   Algomation▲77

   A didactic, animated, exposition of algorithms

   2014 · algomation.com · its alternatives →

8. 8MA
   MediSim – A 3D simulation of emergent Behavior in little civilizations▲8

   2016 · stewart-taylor.github.io · its alternatives →

9. 9IB
   I built an interactive 3D three-body problem simulator in the browser▲60

   Mar 2026 · structuredlabs.github.io · its alternatives →

10. 10VC
    virtual-clock.js – adjustable timekeeping for simulations/games/etc▲7

    2017 · npmjs.com · its alternatives →

11. 11AA
    An Avatar game with realistic physics▲6

    2020 · fraser-greenlee.github.io · its alternatives →

12. 12
    Fluid Simulation for Unity▲5

    2015 · musiubar.com · its alternatives →

13. 13AU
    A US Evolution Simulator▲7

    2022 · us-evolution-simulator.andrew.gr · its alternatives →

14. 14
    SpatialOS - Public Beta▲12

    A platform for building games of ‘unprecedented size’

    2017 · its alternatives →

15. 15
    WebGL particle life – lifelike GPU accelerated particles▲7

    2023 · webgl-particle-life.netlify.app · its alternatives →

16. 16GA
    gallpeters – A website/API to create a simple, customizable world map▲8

    2022 · gallpeters.vercel.app · its alternatives →

17. 17
    matter.js▲3

    A 2D physics engine for the web

    2016 · brm.io · its alternatives →

18. 18
    A free tool for real world procedural generation in Unity3D▲7

    2017 · youtube.com · its alternatives →

19. 19
    Manomotion▲10

    Grab and manipulate objects in 3D space

    2016 · manomotion.com · its alternatives →

20. 20M3
    Mercer – 3D data visualization JavaScript library with three.js▲7

    2015 · gmarland.github.io · its alternatives →

21. 21
    Darwinio: An Attempt at an Evolution Simulator▲5

    We made this for our school project. I think we went a little too ambitious.

    2023 · github.com · its alternatives →

22. 22OS
    Open-source SIMD-accelerated math library for C/C++/C#/Java/FORTRAN▲9

    2013 · yeppp.info · its alternatives →

23. 23
    Space.js▲5

    HTML-driven narrative 3D-scrolling

    2015 · slashie.org · its alternatives →

24. 24
    Speck, atomistic system rendering with ambient occlusion in WebGL▲6

    2015 · wwwtyro.github.io · 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 →