I have always only used MultiBox. As long as it works (or there are free alternatives) I will never pay for something. Can I afford Keyclone? Sure. But MultiBox and Octopus are right there *points to software section*

Also, the OP just said he wanted a free program to multibox with because he was already paying for accounts and hardware (the lack of English is probably another problem here).

I think people are starting to use "Keyclone" as a verb instead of a noun (Can you keyclone with that?)