Multiboxing

I would like to try it myself.
What programs are you using and what is the easiest/best way to do it?

I also would like to keep it free, i know that there is KronkBoxer...

Thanks!

Kronk's is by far the easiest and imo best public boxer avalible

BUt as said i'd like to keep it free, Kronks's costs money doh ._.