For home users using the BSD open-source operating system, we offer F-Prot
Antivirus for BSD Workstations.  F-Prot Antivirus for BSD Workstations
utilizes the renowned F-Prot Antivirus scanning engine for primary scan but
has in addition to that a system of internal heuristics devised to search
for unknown viruses

F-Prot Antivirus for BSD was especially developed to effectively eradicate
viruses threatening workstations running FreeBSD, NetBSD, or OpenBSD.  It
provides full protection against macro viruses and other forms of malicious
software - including Trojans.