I am pretty sure the old Armor site used to have a section linking to partner sites and developers. My guess is they didn't put it on the front page because they are going for a much cleaner look with this site, and extra links would clutter it. But if you go to the Armor Blog, you will see developer links listed on the right side of the page.
The game makers who work on AG have a link on the about page, they're part of the AG team. And there are way too much game makers they support.
Yeah, every game has the author's name written right underneath, with a link to their Profile page. Preferably, Developers may supply their Profile with a link to their web page, their email or any other sort of contact information. Firetail is right, Armorgames finances and works together with so many developers that to list them all somewhere in one place would require a separate web page.