M for iOS - Email app with automatic encryption
Burner - Disposable phone numbers -- now with MMS photo support
Hermes - Pandora Client for OS X
Hushed App - Hushed App will allow you to receive a Secondary Phone Number for Private, Long-Distance...
Keybase Chat - End-to-end encrypted chat built into Keybase
Numero eSIM - Numero eSIM is a phone-number app that makes voice and data possible anywhere in the world, for free.