Panda Cloud Antivirus, The first free cloud antivirus against viruses, spyware, rootkits and adware
http://www.cloudantivirus.com/en/

Panda Cloud, the constantly updated, cloud-run antivirus app that promises almost real-time protection from burgeoning web threats, is out of beta and available for a free download

http://lifehacker.com/5401263/panda-cloud-antivirus-available-for-download