SMS Plus - SMS Plus app offers features that let you forward text messages through internet connection as well as through other social media platforms.
Kleopatra - Kleopatra is a certificate manager and GUI for GnuPG.
PhoneLeash: SMS/MMS forwarding - PhoneLeash: SMS/MMS forwarding app offers features that let you forward your desired text messages and multimedia messages to your email or your other mobile phone so that you can access them later.
Enigmail - Security extension to Mozilla Thunderbird and SeaMonkey
NetSfere Secure Messaging - NetSfere Secure Messaging is a secure messaging app that enables you to send messages by using 256-bit device-to-device encryption features.
APG - Android Privacy Guard (APG) is a free and open source application for ...