The Tor project - Tor was originally designed, implemented, and deployed as a third-generation onion routing project of the U.S. Naval Research Laboratory. It was originally developed with the U.S. Navy in mind, for the primary purpose of protecting government communications. Today, it is used every day for a wide variety of purposes by normal people, the military, journalists, law enforcement officers, activists, and many others.
OpenVPN -OpenVPN Technologies is a privately held company based in the Pleasanton, California, integrating a suite of leading-edge networking and software technologies.
HideMyAss – HideMyAss is a privately owned UK company providing VPN and Proxy services.
OneShar.es – A mailing service for sending encrypted self-destructing one read only emails.
Burnnote.com – Make online conversations more private. Messages self destruct 116 seconds after opening.
GnuPG is a free implementation of PGP encryption software. Enabling files to be encrypted to a fairly high standard.
Commercial company offering encrypted comms (Voice and Data) for mobile and static devices.
Off-the-Record-Messaging IM encryption and authentication.
Truecrypt is a free and opensource file and disc encryption for on the fly encryption.
BleachBit quickly frees disk space and tirelessly guards your privacy. Free cache, delete cookies, clear Internet history, shred temporary files, delete logs, and discard junk.
CyberGhost also offer a free tier which does not require the user to have an account.