I'll see what I can do.
What's different about Stardock / Ironclad is that, thanks to the Internet, we're constantly connected. So that source code, graphics, and other assets flow. So when I look at a ship or an effect or what have you, I honestly can't tell you who did it.
And it's not just on the programming side. Ironclad does a lot of marketing-level stuff that normally are related to the publisher. Even this website, I'm not sure who did what.
I'm not aware of any other publisher/developer arrangements like what is done with Stardock and Ironclad.