block.c Prevents a user from logging in by monitoring utmp and closing down his tty port as soon as it appears in the system. http://firewall.com/software/block.c
BullGuard Protect your PC from hackers and viruses. With full antivirus, firewall, and backup protection, BullGuard secures your PC from the menaces of the Web. BullGuard features full e-mail protection, no matter what e-mail-client you use. The antivirus database is maintained and updated around the clock. Powerful scan engines ensure detection and removal of all the newest viruses. Also, all peer-to-peer applications such as Kazaa and ICQ, http://www.bullguard.net
Computer Monitoring Software Offers computer and internet monitoring software for secretly recording all PC activities. http://www.computer-monitoring.com
COPS (V1.04) COPS (Computer Oracle and Password System) checks for many common Unix system misconfigurations. A very valuable tool as it is non-trivial to break a system which has passed a COPS check. It's getting a bit old, but it's still an excellent way to systematically check for file permission mistakes. http://firewall.com/software/cops_104.tar.gz
Crack (V4.1) Crack is a tool for insuring that your Unix system's users have not selected easily guessed passwords which appear in standard dictionaries. (Only a very small dictionary is included so grab the one below if you wish.) http://firewall.com/software/crack_4.1.tar.gz
Crack Dictionary A general 50,000 word dictionary for use with Crack. http://firewall.com/software/crack_dict.txt.gz
CryptoTunnel VPN2GO CryptoTunnel™ VPN2GO™ is the first product in the CryptoTunnel™ family being launched and uses the latest encryption technology available. Apart from being an affordable, secure channel for confidential communication, encrypted web surfing, online shopping, and protection of personal information, it is the only product available on the market today which actually shows you how secure you are and what your data looks like when it leaves your computer. http://www.cryptotunnel.com