Are you looking for popular or good hacks? There's a huge difference between the two... Since I don't care about popular, I'll tell you what are the 3 BEST out there in my opinion.
1. vgk.rip: by far the absolute best. A complete hack for all your needs, it has esp, aim, radar, trigger, lineup helper etc.
2. Vanuri: a very good colorbot with great accuracy. It is light, safe and cheap.
3. Moonligh: a dual computer colorbot that is very solid.