Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
HTTPS Everywhere - Chrome extension that encrypts and secures your browser
MyChat - Secure instant messenger for any network
Smart HTTPS - Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts...
Ubiq Security - Enable developers to build encryption into apps in minutes
HTTPZ - HTTPZ is meant to be unobtrusive and lightweight.