VirusTotal-Online Virus analyser:
VirusTotal is a service that analyzes suspicious files and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware detected by antivirus engines.
Specs:
*Free, independent service
*Use of multiple antivirus engines
*Real-time automatic updates of virus signatures
*Detailed results from each antivirus engine
*Real time global statistics
Visit http://www.virustotal.com