70 years after the author’s death IIRC

Bethesda released it for free before they shut down their proprietary game launcher a few years ago, so a totally legitimate copy is already on the web archive :-)

https://archive.org/details/morrowind_free_download

If you own the game, just get a torrent or something.

They did release both Arena and Daggerfall for free after a while.

I keep a USB DVD drive for this reason. I should upgrade to BD when it craps out

Maybe if you actually entered the webpage...

OpenMW is a free, open source, and modern engine which re-implements and extends the 2002 NetImmerse engine for the open-world role-playing game The Elder Scrolls III: Morrowind.

Skywind: Playing the plot of Morrowind in the Skyrim engine. Game mechanics, spells, skills, models, textures, and bugs are all going to be similar to what you have in Skyrim, give or take some modding.

OpenMW: Playing Morrowind in an open source, crossplatform game engine. You are playing the exact same game as TES III (gameplay mechanics, spells, models, textures, etc are 1:1 identical in a vanilla install) but the code behind it is less buggy, more moddable, and it provides many modern quality-of-life improvements that the original engine couldn't do.

They are both in some way related to The Elder Scrolls III: Morrowind
OpenMW is an open source game engine that can be used to play Morrowind. (There is an unfinished "Example Suite", a CC0 licensed game data that can be used instead of Morrowind game data, so technically OpenMW does not play just Morrowind. Feel free to come help finish the Example Suite)
Skywind is remake / reimagining of Morrowind game in a modified Skyrim engine.

tl:dr it's not

Yeah, basically if you want to play Morrowind, at this point you want to do so by using OpenMW. You do need to own the original game, but OpenMW makes it much easier to run on modern operating systems and has lots of quality-of-life improvements, like higher resolution, higher viewing distance, as well as most loading times eliminated.