@Ishh
Howdy and welcome to the forums!

i cannot attest to the other apps, but keyclone does cost money, has no viruses (that would hurt my 10 year old company name), and does allow you to run multiple copies of wow on one machine... assuming your machine can handle it. it does a few tricks to help squeeze more fps out of your box.

here's a link to an example screen using keyclone's maximizer and multiple wows on one machine:
[Keyclone] PiP explained

if you have any questions, please feel free to drop me a note.

--Rob