Here's the one for Bitdefender.
Add the repository by going to System - Administration - Software Sources, click on the 'Other Software' (previously 'Third Party Software') tab. Now click on 'Add' and enter.
deb http://download.bitdefender.com/repos/deb/ bitdefender non-free
sudo apt-key add bd.key.asc
sudo apt-get update
Once complete you now need to log out and log back in again. a menu shortcut will be generated (Applications - System Tools - BitDefender Scanner).
sudo apt-get install bitdefender-scanner-gui
Before running the scanner it's probably best to install the latest virus/malware signatures by clicking on the 'Update' button.
BitDefender comes with a standard 30 day free license, when first installed. It is free for private and personal use - the license can be extended to one year by requesting a new license key from http://www.bitdefender.com/site/Prod...cannerLicense/ For all business use a paid for license is required.