Sorry for somewhat necro answer, but hell it might be helpful for other random and rare visitors.
The answer is yes, most of them do.
Small mods like classes and features works 99%. Item and hero packs should also work.
Modpacks and huge conversions - dunno. I've tried "Life & Death" at least and technically it works.
None of them is supported though, so either you can only rely on yourself if you wanna change something.