https://www.mobygames.com/group/9867/middleware-recast/

It's not a terribly long list, it seems, even if it's non-exhaustive.

> I see the industry is of full double standards

Absolutely, and that's why it's so great. No two companies are going to look the same. The culture of the video games industry is a rather unique one that's kept its archipelago syndrome alive against all odds. It'll be a sad day if that ever changes.