Vircadia
Vircadia open source metaverse platform
...All building and scripting of your world happens in real-time. This means that building is quick, efficient, and collaborative. Vircadia worlds can be accessed from Windows, Linux, and MacOS. Android, iOS, and Quest 2 support is coming soon. Unlike most platforms, Vircadia is 100% open source with the full software stack necessary for a premium metaverse experience licensed as Apache 2.0. Because of this, all aspects of the project can be customized for your use case. Vircadia consists of many projects and codebases with its unifying structure's goal being a decentralized metaverse.