Soon enough I will probably be back at Morrowind again.

Is there an easy way to see if mods are compatible with TR? I am trying to see about adding TR, this Project Tamriel (which I assume is compatible with TR) and a few other goodies.

Some of my old favorites are:
Suran Underworld
Beyond YsGramor
Havish
Ghostpath
Illuminated Order
White Wolf of Lokken Mountain
GhostPath
One of the Twin Lamps (I can't remember which)
Uvirith's Legacy
WyrmHaven
Combat Enhanced

+/-
Lothavor's Legacy
Call to Issilar
Inn of Whispering Wood
Tir Thalor/Aerie

A few that I've forgotten

Obviously, I can't remember everything, but those are a few.

If a mod is incompatible with TR/PT, is there an easy way to make it compatible?

Edit: OpenMW seems like something that is talked up as being amazing, however, it seems quite incompatible with various mods. Is it recommended?

Hi! I've played Tamriel Rebuilt but not many of those mods you have listed. TR makes very few changes to Vaardenfell, only really things relating to travel links to the mainland and the House Telvanni Hortator quest. So, I would expect most mods to be compatible that only affect Vaardenfell, unless they are adding new islands or landmass in areas where the TR mainland would be.

Yes, OpenMW is great and I totally recommend it. I did a full runthrough of the game in OpenMW with TR last year and it worked great. Very stable and almost no bugs worth mentioning. I used a few QoL-type mods (improved fonts, signs, animated plant containers, etc) and they all worked fine. In my experience, most mods I saw seemed to be fairly clear about whether they work in OpenMW or not.

Good luck! I hope to play it through again myself sometime, with some of the newer content in TR and some of those additional content mods :-)

From the Tamriel Rebuilt FAQ:

https://www.tamriel-rebuilt.org/about/frequently-asked-questions#compatopenmw

https://www.tamriel-rebuilt.org/about/frequently-asked-questions#compatmods