Seahorse is a Gnome front-end for managing encryption keys and integrates with nautilus, gedit and other applications for encryption purpose. Some of the features of Seahorse:

Backup your keys and keyring
Cache your password
Create and manage SSH keys
Crate and manage PGP keys
Publish and retrieve keys

Seahorse in Action:

From Bastille Man page:

Bastille Linux is a security hardening program for Mandrake, Red Hat, and Debian GNU/Linux. If run in the preferred Interactive mode (using InteractiveBastille), it can teach you a good deal about security while enhancing your system’s protection against attacks. If run in the quicker Automated mode (using AutomatedBastille), it can quickly tighten [...]

The pwgen program generates passwords which are designed to be easily memorized by humans, while being as secure as possible. Human-memorable passwords are never going to be as secure as completely completely random passwords. In particular, passwords generated by pwgen without the -s option should not be used in places where the password could be [...]

FTP is an old protocol and there has been many variations of it’s implementations over the years. These servers listed below vary in many details and far from a complete list of Linux FTP servers out there. But these are few of the most popular Linux FTP servers out there:

ProFTPd This server, http://proftpd.org, is one [...]