SteamEngine is a new open-source UO server emulator coded in C#, which can read and run Sphere scripts. It`s domains are supposed to be extreme customizability even for non-programmers, and a clean and readable codebase.
The project is now abandoned. The "intended for the public" phase ended long ago. The "OldCode" repository is that (if that still works).
Then for a while we intended it for the UO shard moria.cz, but that didn't succeed either, and the shard is now defunct. The last commit...