It depends on the area you are living in. Most restaurants/fast food joints deliver only within a certain radius with respect to their location. But here are some options anyway: 

http://www.gulfdine.com/Black-and-White_Salwa-Road

http://www.gulfdine.com/American-Grill_West-Bay

http://www.gulfdine.com/Diet-Shop_Ramada-Junction

http://www.gulfdine.com/Al-Shami-Home_Opp-Al-Nasr

I am sure you'll find lots of other options on that website.