ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
HTTPS Everywhere - Chrome extension that encrypts and secures your browser
Enigmail - Security extension to Mozilla Thunderbird and SeaMonkey
SSL Enforcer - SSL Enforcer - Force SSL/TLS encryption for any browser or app. Block all unsecure connections.
Mailvelope - Mailvelope open source project. OpenPGP in your browser.
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.