Sourcefire has bought the ClamAV project for an extraordinary, one-time charge in the third quarter of 2007 of between 9¢ and 12¢ per Sourcefire share. ClamAV is an open source project that has created an anti virus engine, packages that support its use on Linux, Unix, BSD and Win32, and a signature database that currently contains more than 147,000 signatures. It is by most estimates the most commonly used open source anti virus product in the world.

The deal covers the intellectual property, copyrights, logo, domain names, Sourceforge and Freshmeat areas, naming rights and other rights to Clam, the Open source anti virus engine and signature database. The ClamAV team - in particular Tomasz Kojm, will become Sourcefire employees and continue their management of the project on a day-to-day basis.