I think NoFap has the biggest future.
The Developer is nice and tries to add as much Features as possible in near future.
But you can use the Trial Version for unlimited Time atm, but this will be changed this week.
But if you want a Bot that is now already very advanced i would say you should buy MMOGuider. But MMOGuider got some Bugs on Vista/Windows 7.
MMOGuider got a Trial too.