Software cheats?

I have heard that there is software available that can be used to cheat other players and companies. Is there any real truth in this? Apparently someone can set it up to play several different games at once. I didn't think this was possible but my friend seems convinced?

Do not believe in betting systems: Strategies based on mathematics and probabilities will serve you far better than any `betting systems` developed by some local know-it-all. If it sounds too good to be true, it probably is. Stick to proven strategies and stay away from unproven schemes.

The thing that makes me wonder is that all these strategies seem to cost money to buy. I never see people saying here take a look at this. No they want payment for the info first. That makes me think there is nothing in the claims they make.