Dev tools · alternatives · 2026
24 alternatives to Third Room Tech Preview: open decentralised worlds built on Matrix
Hi all, We just launched the first public tech preview of Third Room: an open source, standards-based, decentralised vision of interoperable virtual worlds for the open Web, built entirely on Matrix - without cryptocurrencies, NFTs or walled gardens. It's built on an new opensource game engine for the web called Manifold, which provides a solid 60fps of fullscreen 3D thanks to multithreading across webworkers using SharedArrayBuffers and Atomics, using Three.js for rendering, bitECS as an entity component system, Rapier for physics and Hydrogen for Matrix chat+networking. It requires no…
Third Room is an open-source platform for building decentralized virtual worlds on the Matrix protocol. It enables users to create and explore interconnected 3D environments without cryptocurrency, NFTs, or centralized… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Third Room Tech Preview: open decentralised worlds built on Matrix launched in 2022; newer entries below may have overtaken it.
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Hey HN, We’re Philip, Amby, and Declan, and we made “multiplayer virtual computers” that you can embed anywhere, including 3D spaces. We decided to build this because we noticed that embedding third-party apps and websites can be a nightmare due to incompatible platforms, security issues, and poor UX. Adding multiplayer functionality to these embeds makes this problem exponentially more difficult. On the backend, we’re spinning up a VM and running a resource-optimized fork of Chromium which we then stream to participants via WebRTC. Since we’re hosting the servers running the applications,…
2022 · threejs-example.hyperbeam.com · its alternatives →
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I open sourced my HTML5 multiplayer 3D voxel browser game engine.
2023 · kevzettler.com · its alternatives →
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Roometron is innovative online service to visualize, promote and design apartments in 3D.
2024 · roometron.com · its alternatives →
- 5IB
I've been working on an MMORPG that is now in alpha as a solo developer. Here are the major open source technologies that I use: Blender - 3D modeling software for creating the overall environment and every game object. I've gotten a lot of CC and Public Domain assets from https://poly.pizza GLTF - I export assets from blender to the GLTF asset format JSON - I write a JSON config for every game object that describes things like its name, its interactions, its collisions, etc. Node.js exporter - I iterate over the environment and every asset to create a scene hierarchy. I use…
2024 · alpha.reconquer.online · its alternatives →
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Rooms 3.0▲276Add motion, sound, particles, & more with just a few taps
2024 · rooms.xyz · its alternatives →
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floors.js▲215Hey HN, I'm Vincent. I built floors.js to bring back social interactions on the web. You paste one script tag. Your pages become isometric 3D rooms. Visitors show up as avatars, see each other, and chat in real-time. Three.js handles the isometric rendering, and a Bun WebSocket server manages presence, rooms and chat. The whole thing runs without touching the host site's DOM or styles beyond its own container. It works on any static site and is also optimised for SPA navigation (clicking on a door lets you navigate to another page). The landing page itself is the live demo, and I'm in the…
Feb 2026 · floorsjs.com · its alternatives →
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Decentraland 2.0▲165Explore a virtual world owned by its users
2021 · decentraland.org · its alternatives →
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2019 · alexanderperrin.com.au · its alternatives →
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2019 · urk-3d-multi-space-game.herokuapp.com · its alternatives →
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A web framework for building multi-user virtual reality experiences. - networked-aframe/networked-aframe
2017 · github.com · its alternatives →
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I think it's finally time to lock version 0.2 of my 4d side project. (Since previous Show HN a couple of years ago: https://news.ycombinator.com/item?id=37100760 I scrapped lots of stuff and concentrated on making a javascript "game engine") The sole purpose of this project is to explore whether it's possible to make the human brain spatially aware of four dimensions using Virtual Reality. It’s my first ever game project, my first time using Unity, first time writing C#, and my first anything with WebXR, so please be gentle! To manage expectations, it isn't visually pleasing…
2025 · brainpaingames.com · its alternatives →
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Render 3D models (OBJ, glTF, GLB, STL, .vox) as ASCII art — in the browser, in React or Vue, or straight in your terminal. A three.js-style API with no WebGL and no canvas: just text in a single <pre>.
Jun 2026 · glyphcss.com · its alternatives →
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2018 · paiza-battle-ground.paiza-user.cloud · its alternatives →
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Mozilla Hub▲90Meet, share and collaborate in private 3D virtual spaces
2022 · support.mozilla.org · its alternatives →
- 18IM
I made this site using R3F (https://github.com/pmndrs/react-three-fiber), a React renderer for 3JS (https://threejs.org/). The celestial bodies are Three.JS meshes. I used loaders (namely 'useLoader' from R3F and 'GLTFLoader' from 3JS) to import 3D models, such as International Space Station. More on loading models in R3F: https://docs.pmnd.rs/react-three-fiber/tutorials/loading-mod... I've future plans for this side project. It would be great to hear from the HN community before diving into them. Enjoy! P.S: Getting an empty…
2022 · spaceinbrowser.com · its alternatives →
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cubicles.lol▲109A metaverse for builders, side projects, and bad driving
Sep 2026 · cubicles.lol · its alternatives →
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A CSS 3D engine for the DOM. Renders polygon meshes in HTML by leveraging matrix3d transforms. - GitHub - layoutit/polycss: A CSS 3D engine for the DOM. Renders polygon meshes in HTML by leveraging matrix3d transforms.
Jun 2026 · github.com · its alternatives →
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I was looking for a tiny library to easily transform both 2D & 3D objects with simple mouse / touch controls and a fixed camera, in the browser. Like a simple 3D editor but without requiring the user to be a Blender expert. Couldn't find anything lightweight, so I’m building one. Think Fabric.js but for 3D. Built entirely with Three.js / R3F. Borrowed some inspiration from VR/AR interaction systems for controls. Feel free to play with it and let me know what you think!
2025 · punk.cam · its alternatives →
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Third Space▲26The 1st user-friendly no-code website builder for Web3.
2024 · dappzy.io · its alternatives →
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A physical puzzle game within a beautifully tactile world
2015 · fireproofgames.com · its alternatives →
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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 →