A whole bunch, but I will start with these for the moment: Pizza Hut, Burger King, Sonic, Taco Tico, Taco Bell, Danny's, Golden Corral, Taste of China, Alejandro's, KFC, Long John Silver. (More to come)
I don't eat a lot of fast food anymore because it is extremely unhealthy (and in most cases entirely unsanitary). But here are some places I did use to frequent before I went on my health binge:
McDonalds (probably the only place I'll still go, albeit not often, because it's super good like damn)
Burger King (ok here too)
Arby's (ok here three)
Wendy's (I haven't eaten at Wendy's since it gave me food poisoning as a kid)
This list was significantly shorter than I thought it would be, given my previous bad eating habits. I will never ever eat at Taco Bell; just the thought of it makes my stomach turn. I don't even know how its food tastes but I've heard too many horror stories about the place to care. I hear Chick Fil A is pretty good, but the nearest one is probably like a half an hour away and given the controversy it's had in the past, I'm in no mood to drive that far to patronize that company.
New York Fries