It uses the tried, tested and very popular ClamAV open source antivirus engine as a back end.

Features:

• Clean, simple-to-use interface
• Clearly lists infected files
• Free virus definitions (usually updated daily)
• Save your favourite scan locations for easy access
• Customise the toolbar - or hide it entirely
• Send selected files to quarantine or trash with one click
• Specify files to exclude using plain text* or by using drag & drop from the Finder
• Specify schedules to update virus definitions and perform scans
• Use ClamXav Sentry to monitor your hard drive and scan new files as they arrive
• Use the bundled ClamAV engine or bring your own installation
• Compatible with 10.4, 10.5 and 10.6 Snow Leopard