What is Open Sim? "OpenSim — short for OpenSimulator — is free, open source software that allows anyone to create a virtual world and run in on their own computer." Where did I learn this? On the website of Hypergrid Business, an online publication about “immersive virtual reality environments and virtual worlds.” https://www.hypergridbusiness.com/faq/what-is-opensim/

Hypergrid Business has a lot to offer people interested in OS.
Open Sim news: https://www.hypergridbusiness.com/category/metaverse/
Active OpenSim Grids https://www.hypergridbusiness.com/statistics/active-grids/
Grids Renting Land https://www.hypergridbusiness.com/category/vendors/single-...
If interested in the wider realm of virtual world, here is the home page: https://www.hypergridbusiness.com/

Oh, and ya. Open Sim is also the name of a virtual human muscle and skeleton simulator. Confusing.