Comodo Antivirus
Comodo Antivirus provides real-time scanning, where it resides in memory and checks your programs for viruses as they are run, as well as on-demand scanning for viruses. You can also schedule your scans. It automatically updates itself through the internet. Note that you have to activate your copy as well as supply your email address to get and use this software.
Clam AntiVirus
ClamAV is a free command line antivirus scanner for Unix systems. You can also integrate it with your mail server for scanning your email messages and attachments. It is able to scan inside archives like RAR archives, Zip archives, Gzip and Bzip2 archives (that is, it has unpacking engines for those types of compressed archives). If you are a programmer, you can even integrate the antivirus scanner into your own programs. This free antivirus program comes with source code that is released under the GNU General Public License. Prebuilt binary packages are available for numerous Linux distributions (Debian, RedHat / Fedora, PLD Linux, Mandrake), Microsoft Windows, FreeBSD, OpenBSD, AIX, OSF and Solaris 8 (Sparc).
AntiVir Personal Edition
AntiVir Personal Edition is a free antivirus program for Windows computers. It has a resident component that monitors file movements for signs of viruses. It also allows you to scan your computer and repair files that have been infected. The program comes with a facility to automatically check the AntiVir website for updates to the virus definitions and download them. Updates are free.
AVG Anti-Virus
The AVG Anti-Virus software comprises a resident program that works in the background, an email scanner (checks your email for viruses), an on-demand scanner (eg, you invoke it to scan your system), the ability to repair certain infected files, and automatic updates of the virus definitions.
F-Prot Antivirus for Linux, FreeBSD, OpenBSD, NetBSD and DOS
F-Prot Antivirus for DOS, Linux and BSD (FreeBSD, OpenBSD and NetBSD) is free for personal use on personal workstations. (Note: these are separate downloads; scroll down on their page to find the link appropriate for your system. Also note that the Windows and Solaris versions are not free.)
avast! Home Edition
avast! Home Edition is free for home users on non-commercial computers. You have to register your copy and supply them your email address so that they can send you a license key to activate the program.
BitDefender Free Edition
BitDefender Free Edition is a free antivirus program that includes on demand scanning, scheduled scanning, automatic and manual updates of antivirus definitions, etc. There appear to be versions available for Windows, MSDOS, Linux, Windows CE, and Palm.
