This antivirus utility from Symantec Corporation gives you unparalleled protection that's safe and easy to use. Use it against viruses in Internet downloads, email attachments, CDs, floppy disks, shared files, and networks. It detects and removes all know http://www.symantec.com/nav/nav_mac/
Complete antivirus software suite for the Macintosh to eliminates all known viruses including system and macro viruses. Supports archive scans http://www.intego.com/virusbarrier/
Macintosh antivirus news, advisories, downloads and reviews of mac virus scanners and definitions of viruses and trojans for Mac OS and Mac OS X. http://www.macvirus.org/
An expandable free Mac antivirus program by John Dalgliesh. It offers both standard virus-scanning facilities and more advanced background protection, so you don't get infected in the first place. http://www.defyne.org/agax/
A free HyperCard virus utility written by Bill Swagerty that will inspect all the stacks on your hard drive, or any part of it, for most HyperCard viruses. http://www.hyperactivesw.com/Virus2.html
These antivirus utilities by Ioannis Galidakis are meant to track down 68K viruses on your system. They MAY prove to be useful, if you are unable or unwilling to purchase professional commercial antivirus software, or in conjunction with such software. http://users.forthnet.gr/ath/jgal/programming/index.html
This program by James Walker scans your local drives for the AutoStart 9805 worm variants (A through F), and will also alert you to unknown files with suspiciously similar properties. http://www.jwwalker.com/pages/worm.html