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.
Cyph - Cyph is the name of a completely free chatting website that provides its visitors with a secure and safe chatting environment.
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
Keybase Chat - End-to-end encrypted chat built into Keybase