On a related note, there's a fork of OpenMW that lets you play the game multiplayer with your friends: https://tes3mp.com/
Unfortunately, it's a bit outdated (based on 0.47), but OpenMW devs have announced their intention to add multiplayer to upstream as well.
Additionally, one can't talk about Morrowind fan projects without mentioning Tamriel Rebuilt, a 24-year-and-counting effort to build all of Tamriel within Morrowind. It's not done yet, but it already has twice as many quests as the base game [0], massive landmasses, joinable factions and a city that's way bigger than anything the base game has to offer, all while staying lore-friendly and neatly integrated.
Nit/Correction; Tamriel Rebuilt is not about adding all the Tamriel but only Morrowind mainland. What you might be thinking about is Project Tamriel [0] which tries to add Cyrodill, Skyrim, High Rock and Hammerfell. They're working in collaboration with Tamriel Rebuilt so they are all compatible and share many resources.
Unfortunately, it's a bit outdated (based on 0.47), but OpenMW devs have announced their intention to add multiplayer to upstream as well.
Additionally, one can't talk about Morrowind fan projects without mentioning Tamriel Rebuilt, a 24-year-and-counting effort to build all of Tamriel within Morrowind. It's not done yet, but it already has twice as many quests as the base game [0], massive landmasses, joinable factions and a city that's way bigger than anything the base game has to offer, all while staying lore-friendly and neatly integrated.
Times are good for Morrowind fans.
[0] https://www.tamriel-rebuilt.org/about/frequently-asked-quest...