http://www.backbox.org/ --- Flexible Penetration Testing Distribution
http://www.openwall.com/john/ --- password cracker
http://moscrack.sourceforge.net/ --cracking WPA keys in parallel on a group of computers
http://www.la-samhna.de/samhain/ ---file integrity / host-based intrusion detection system
http://seccubus.com/ automates regular vulnerability scans with Nessus and OpenVAS and provides delta reporting.
http://www.modsecurity.org/ -- Open source web app firewall
http://arpon.sourceforge.net/ -- Defend Man In The Middle (MITM)
http://www.packetfence.org/ --Free and Open Source network access control (NAC) solution
http://www.autosectools.com/Software
http://christophergriffith.net/chris/downloads.php?file=bptks --- Old data , but still can be used as basics of pentesting
http://www.lupopensuite.com/bestapps.htm freeware portable apps
http://www.portablefreeware.com/
http://browsershots.org/
http://sourceforge.net/projects/italc/ iTALC - OpenSource classroom management
