Hermes - Pandora Client for OS X
Pithos - pithos is a daemon which provides an S3-compatible frontend for storing files in a Cassandra cluster.
Facebook Creator - Video tools for influencers
Keybase Chat - End-to-end encrypted chat built into Keybase
Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
M for iOS - Email app with automatic encryption