HeaderCleaner is a small SMTP server plugin that will only allow a set of predefined headers in an outgoing email message and will strip all other headers from the message. This is meant to improve your privacy and better protect the mail handling server. This version is made for Communigate-Pro, but can be adapted for other systems.
Liberté Linux is a secure, reliable, lightweight, and easy to use Gentoo-based live USB Linux distribution intended as a communication aid in hostile environments. It installs as a regular directory on a USB/SD key, and after a single-click setup, boots on any desktop computer or laptop. The Internet connection is then used to set up a Tor circuit, which handles all network communication. During first boot, a unique email ID is generated from fingerprints of user's certificate and Tor hidden service key. This persistent ID allows one to stealthily communicate with other Liberté users. The distribution includes image and document processing applications, and can function as a secure Web browsing platform. For developers, Liberté can also serve as a robust framework for mastering Gentoo-based live USBs/CDs. The build process is fully automated with incremental build support, and is more mature and reliable than most of Gentoo's own outdated live CD tools.
Privatix Live-System is a portable encrypted operating system designed to be run directly from a USB flash drive or an external hard drive. This allows the user to safely edit and carry along sensitive data for encrypted communication and anonymous Web surfing. It is based on Debian GNU/Linux.
UsbCryptFormat is a graphical user interface (GUI) for the encryption of USB flash drives or external hard drives. It allows the user to reformat a USB flash drive, an SD card, or an external hard drive with an encrypted filesystem very easily and without the danger of destroying data on an internal hard drive because of incautious handling of device names. So it is usable even for a layperson.
Whonix is an anonymous general-purpose operating system based on Virtual Box, Debian GNU/Linux, and Tor. By design, IP and DNS leaks are impossible. Not even malware with root rights can find out the user's real IP/location, because Whonix consists of two (virtual) machines. One machine solely runs Tor and acts as a gateway, called Whonix-Gateway. The other machine, Whonix-Workstation, is on a completely isolated network. Only connections through Tor are possible.