Delta / Comair, ASA, Freedom, Mesa, Republic, Chautauqua, Shuttle America, ACA, SkyWest, Mesaba, Pinnacle, ExpressJet, Compass
The difference is that the pilots of Delta (incorrectly IMO) agreed in their contract SCOPE to allow these "alter-ego" airlines to fly their passenger with aircraft painted in their colors.
Freedom and Gojets were not accepted by Mesa or TSA pilots, but their contract SCOPE was too weak.