Vircadia
Second Life
VRChat
Facebook Spaces
Hubs by Mozilla
OpenSimulator
Sansar
vTime XR
Cachely.dev
nxCloud
Cachely is the managed self-hosted remote cache for Nx and Turborepo - the cache backend you'd otherwise build and run yourself, hosted for you on Cloudflare's edge (R2). It's a drop-in replacement for a DIY @nx/s3-cache / S3 bucket setup: point your build tool at Cachely with a token and two environment variables, and share build cache across CI and every developer's laptop.
Unlike a self-hosted cache, Cachely enforces read-only tokens at the API, so pull-request and fork builds can read but never write - closing the Nx cache-poisoning attack (CVE-2025-36852). It adds ROI reporting (the real build minutes and dollars the cache saved), per-tool insights, and build-optimization suggestions on top.
Pricing is a flat per-workspace subscription with no per-seat fees - add every developer, bot, and CI actor without watching the bill. Cachely never stores your source code; it caches only task outputs and their content hashes. Nx and Turborepo today; Bazel on the roadmap.
Vircadia Cachely.devMost of the 3D world experiences limit what a user can build and do. This is not so with Vircadia. The Apache license makes this 3D application the most flexible tool for building custom and interactive worlds. Vircadia is truly free, open and relatively easy to use. There are several developers who are working and improving this platform daily! Free content ensures that new users have access to materials for building their world without having to worry about learning difficult 3D applications. I highly recommend Vircadia and believe this will be the next big server technology on the world wide web.
Probably the best open-source metaverse
Based on our record, Vircadia seems to be more popular. It has been mentiond 19 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Vircadia is an open source (Apache 2.0) metaverse ecosystem consisting of a high performance real-time server architecture (C++), web SDK (TS), and web client (TS). Source: over 2 years ago
Not pre-baked. I work on https://vircadia.com/ -- it has to give every user their own audio mix to account for their 3D position. This means codec costs add up fast. You can't just encode once and stream the same thing to a dozen people. - Source: Hacker News / over 4 years ago
Both, primarily the first. Low latency is definitely a requirement, but no issues with Opus on that account. > I haven't looked into how expensive it is to encode in terms of CPU time, so I assume maybe you're taking about a bottleneck in terms of the number of simultaneous streams you can support on a single CPU? Yup! I work on https://vircadia.com/ -- we have to compress audio in real time and every user gets... - Source: Hacker News / over 4 years ago
Second Life improved avatars by quite a lot in fairly recent times. There's also alternatives to it, eg, check out the project I work on: https://vircadia.com/ It's a sort of spiritual successor to Second Life, since it was started by the same guy -- Philip Rosedale -- after he left SL. It didn't quite work, so the commercial project died and got picked up by open source forks, which is what I work on. It's less... - Source: Hacker News / over 4 years ago
To me it's useful/entertaining in the ways forums and chats are, plus some additional features on top of that. Eg, you can talk to people, but in addition to that you have a collaborative 3D environment with positional audio where you can script, make games or do other stuff. Recently a group using our project put up a Christmas Carol VR play, and the results were most impressive. https://vircadia.com/ -- it's an... - Source: Hacker News / over 4 years ago
Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
nxCloud - nxCloud is a commercial OwnCloud provider
VRChat - Create and play in virtual worlds with others
Facebook Spaces - Facebook's social Virtual Reality platform is here!
Hubs by Mozilla - A WebVR experiment from Mozilla Mixed Reality
OpenSimulator - OpenSimulator is an open source multi-platform, multi-user 3D application server.