Trapdoor2 (td2) allows remote users to execute local commands by sending 'magic cookies'. this can e.g. be used to alter local firewalling rules so people can connect to local services after sending the magick cookie.
Psad is a collection of three lightweight system daemons (two main daemons and one helper daemon) that run on Linux machines and analyze iptables log messages to detect port scans and other suspicious traffic.
Keyring lets you securely store digital secret keys on your Palm handheld computer. This information might include computer account passwords, credit card or banking numbers, GnuPG passphrases, or OPIE pads. (Previously "GNU Keyring for PalmOS".)
pyCA tries to make it easier for people to set up and run a organizational certificate authority which fulfills the need for a fairly secure certification processing.
authfail is a tool for adding IP addresses to an ACL when entities from those addresses attempt to log into a system, but cause authentication failures in auth.log.