Encrypted Notepad - Encrypted Notepad is a very simple to use application providing state of the art...
Twinme - Twinme – Private Messenger is a free, secure, instant, and high-definition messaging app that protects your privacy along with giving you full control over each of your relationships and contents.
Paranoia Text Encryption - Paranoia Text Encryption encrypts text according to a choice of strong algorithms.
Textra - Textra is a seriously beautiful, feature rich SMS and MMS app.
Notebook PEA - Protects your private notes with a password.
Material Messaging - Material Messaging is a beautiful communication app that lets you send and receive SMS and MMS messages using the intuitive interface while giving you complete control over every aspect of your messaging experience.