"CrossUO is developed by a team that worked on Orion. It's an open source suite that includes a launcher, an updater and a client, to play UO on the platform of your choice and that works with many eras of the game and with almost any shard!!!
There's also an assistant Razor-like in development that is not released yet. The multilingal team is ready to answer your questions and read your feedback if there's anything with the suite.To follow the project:
Website: https://crossuo.com
Discord: https://discord.gg/FhNvsb6
Github: https://github.com/crossuo/
Be a part of a new old school adventure! The immortal Ultima Online is now available on mac and linux!"