Don't get Speed0, get Cheatengine
I've had previously recommended Speed0, but now I know the truth about it.
Cheatengine is free software which provides easy access to what Speed0 does, but even better! I can say that because I've tested both speed0 and cheatengine on some games, but only cheatengine worked on some of them, while Speed0 didn't work on any extra games.
That means the code is NOT JUST STOLEN, but DOWNGRADED as well. Wait, is there proof of this? Yes. The main dll is digitally signed by Cheatengine's developer, who has explicited stated this. You can also use hotkeys on Cheatengine, so there is absolutely zero reason to use this downgraded, illegal excuse of a software called Speed0.
Just don't try cheating on online multiplayer games - it's not just a bannable offense, it's a dick move.
Cheatengine's developer saying his code was stolen