Who are the big 3rd party publishers?

[BriarMonkey]

Big by quality, big by impact, or some other big?

Back in the heyday of 3.5, big would be people like (not all inclusive) Mongoose, Sword & Sorcery, Necromancer, and Green Ronin for their volume and, in not all cases mind you, quality of supplements. Now-a-days, I wouldn't consider any big as I've really seen no work from them. (Though, some are defunct and for others, I just may have missed their work, but if I missed it, it can't be that big.)

 

[Aberzanzorax]

Is Kenzer Co producing any stuff for either?

What about 0one games?

 

[Wicht]

0one is producing for Pathfinder.