WorldBox is a server solution for creating a multiplayer virtual universe based on OpenSim technology. Setting up an OpenSim server is usually a rather complex task and often difficult. We developed WorldBox, drawing on our practical years of experience in developing various OpenSim-based projects. Originally, WorldBox was a closed project that we used only for our own purposes, including commercial ones. And today we are ready to share our experience with all who find it interesting. WorldBox will not only speed up the development of the server, but also teach you many features of this amazing platform.