Vuurmuur is a firewall manager for Linux that supports IPv4, IPv6, and traffic shaping. It has powerful monitoring features for logging and live connections. It can be managed entirely through an Ncurses GUI, on the console, or through SSH.
DisPass is a passphrase generator that generates unique passphrases formed from a master password and a label, helping you get rid of the bad habit of using a single password for multiple Web sites. It is a console application, but it also has a simple graphical interface.