clamav: clamav (a GPL-ed virus scanner)
clamav:
clamav: Clam AntiVirus is a GPL anti-virus toolkit for UNIX. The main purpose
clamav: of this software is the integration with mail servers (attachment
clamav: scanning). The package provides a flexible and scalable multi-threaded
clamav: daemon, a command line scanner, and a tool for automatic updating via
clamav: Internet.
clamav: Most importantly, the virus database is kept up to date .
clamav: For setup, see README.slackware in the /usr/doc/clamav-*  directory.
clamav:
clamav: clamav info at http://www.clamav.net/