This page demonstrates that you can run various raffles at the same time.

 For Joom!Fish support go to the download section. There you will find a xml-file for Joom!Fish.

Here is the link to raffle nr. 1

and now for raffle nr. 2  

and last but not least the 3rd one

And now a real raffle,
that shows a bit the possibilities (at least with Firefox),
if you like challenges