what is the best ppc script?

There are some ppc scripts out there and some of the prices are kind of high. Did any one use any of them and could tell me which is the best one?
thank you

 

adsense sure is the best ppc but they have strict tos. check it carefully

 

aha sorry didn't mention that you're looking for a script. i think you can run your own ads without any scripts but using openx.org services.

 

Thank you, I am still learning on it, I will try it.