HTTPS Everywhere - Chrome extension that encrypts and secures your browser
Smart HTTPS - Automatically changes HTTP addresses to the secure HTTPS, and if loading encounters error, reverts...
SSL Enforcer - SSL Enforcer - Force SSL/TLS encryption for any browser or app. Block all unsecure connections.
HTTPS Only - Encrypt the web and stay safe
ForceTLS - ForceTLS allows web sites to tell Firefox that they should be served via HTTPS in the future; this...
The Tor Browser - The Tor Browser is free software that helps you defend against tracking, account hacking, and surveillance on the Web.