Se li vuoi gratis per windows:

http://www.clamwin.com/
http://free.grisoft.com/freeweb.php/doc/2/
http://www.free-av.com/


Se li vuoi gratis per Linux
http://www.clamav.net/
http://www.f-prot.com/products/home_use/linux/

Perche' proprio Panda???