The Elder Scrolls 3: Multiplayer

TES3MP is a branch of OpenMW that adds multiplayer. Download that (0.8.1, non-VR version):

TES3MP

You'll need to install the original Morrowind data, and it's expansions Tribunal and Bloodmoon. Easiest way is to use the openmw-wizard executable that comes with TES3MP, and install from CD's (or iso's, I'm sure they're archived somewhere by some org).
If the option to install from CD is greyed out you'll have to install from the CD's original installer, and select your existing install in the wizard.

My server uses a few mods. You can get them here:

Data Files

Copy everything in that zip into the folder your data files are stored (they end in .esm, or .esp). Then run openmw-launcher and go to the Data Files tab. Make sure they're all toggled on and in this order:

Morrowind.esm
Tribunal.esm
Bloodmoon.esm
Tamriel_Data.esm
TR_Mainland.esm
LGNPC_Merged_Lt.ESP
Better Balanced Combat.esp
Better Balanced Combat - Tamriel Rebuilt Patch.esp

You can click and drag them around to change the order. You should be able to hit "play", which launches the tes3mp-browser, and find the server "clovr".

If you get any errors on load, try running the wizard again.