Security
ClamWin - Free Anti-Virus software (Windows, Linux)
http://www.clamwin.com/ (GPL)
http://www.avast.com/ (Free)
http://www.free-av.com/ (Free)
http://free.grisoft.com/doc/1 (Free)
http://www.spybot.net/en/ (Free)
http://winpooch.free.fr/page/home.php?lang=en (GPL)
http://www.spampal.org/ (Free)
http://spamassassin.apache.org/ (Free, Apache License)
http://www.mailscanner.info/ (GPL)
CoreForce - Personal Firewall (Windows)
http://force.coresecurity.com/ (Apache License)
http://www.zonealarm.com (Free)
http://www.threatfire.com/download/ (Free)
http://www.fwbuilder.org (GPL)
http://www.shorewall.net/ (GPL)
http://www.smoothwall.org/ (GPL)
http://www.nufw.org (GPL)
http://www.cgsecurity.org/wiki/TestDisk (GPL)
http://www.cgsecurity.org/wiki/PhotoRec (GPL)
http://www.sleuthkit.org/autopsy/ (Free)
http://www.sleuthkit.org/sleuthkit/index.php (Free)
WinPcap - windows pcap link layer network access (Windows)
http://www.winpcap.org/ (free Netgroup License)
Wireshark - Windows network diagnostic tool to view the contents of network packets replaces ethereal (Windows, Linux)
http://www.wireshark.org (GPL)
Nmap - Nmap Security Port Scanner (Windows, MacOSX, Linux)
http://insecure.org/ (GPL)
http://analyzer.polito.it/ (free Netgroup License)
http://www.nessus.org/ (Free for personal use, Nessus Software License)
gpg4win - A graphical installer with WinPT and GnuPG Privacy Guard (Windows)
http://www.stud.uni-hannover.de/~twoaday/download.html (GPL)
http://framework.metasploit.com/msf/ (Metasploit Framework License)
http://sectools.org
http://www.opensourcelist.org/tags/security
http://directory.fsf.org/security/Freeware Copyright 2007-2008 GNU General Public License
OSWINS DVD was built by Neville Richter - http://os.cqu.edu.au/oswinsdvd