Personal Communication
Electronic
Unseen.is
{
Webmail
}
Diaspora*
Cryptocat
{
Blog
} {
Firefox extension
}
Pidgin
with Off-the-Record (O.T.R.) Messaging
Thunderbird
with
Enigmail
RedPhone and TextSecure
LEAP
StartMail
Non-Electronic
http://www.survivalblog.com/2005/11/david-in-israel-on-practical-p.html
https://www.schneier.com/solitaire.html
References
http://blog.cryptographyengineering.com/2013/03/here-come-encryption-apps.html
TUTORIALS