vipass is a small perl script that creates a gnupg encrypted text file within which you can store passwords. It decrypts into memory and allows you to search for a text string within the file, so you don't display all passwords at once.
NAC is a collection of tools for cryptography. The goal is to provide simple-to-use crypto tools (like an OTP, String and number generator, public key algorithm...) you can use under Linux, Windows...
fwsnort translates Snort rules into equivalent iptables rules. The iptables string matching capability is heavily used, along with custom signature matching chains built by fwsnort.