Clam AntiVirus is an open source (GPL) anti-virus toolkit for UNIX, designed especially for e-mail scanning on mail gateways. It provides a number of utilities including a flexible and scalable multi-threaded daemon, a command line scanner and advanced tool for automatic database updates. The core of the package is an anti-virus engine available in a form of shared library.

ClamAVis also available for Windows as the result of a partnership between Immunet Corporation and Sourcefire, Inc. It is designed to provide the ClamAV community with a free Windows-specific Anti-Virus (AV) solution using an advanced Cloud-based protection mechanism.

Smallest of all AV-applications: only 3.45MB download-file (32bit).

You can use ClamAV For Windows as a stand-alone, host-based AV solution, or in conjunction with your pre-installed AV solution to provide enhanced detection for the latest malware threats.