M for iOS - Email app with automatic encryption
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
HTTPS Everywhere - Chrome extension that encrypts and secures your browser
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Smart HTTPS - Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts...
HEY - Email at its best, new from Basecamp.