Kamikaze drones aren't very common, and have yet to appear in service in most countries.
If you're talking about fixed-wing gunships, then those have already been suggested. The problem with them is the existence of other close-air-support aircraft, like helicopters and strike fighters, bombers, etc.
Currently on (potentially permanent) hiatus Instead of choosing wings to fly, we chose hands to hold with each other. Yet the sky still fascinates us, is it such a crime to keep on dreaming?