Open Whisper Systems

Privacy is possible. Signal makes it easy. * Say Anything - Send high-quality group, text, picture, and video messages, all without SMS and MMS fees.* …

TextSecure is a messaging app that allows you to take back your privacy while easily communicating with friends.Using TextSecure, you can communicate …

Flock syncs your contacts and calendars between multiple devices while protecting your privacy with strong encryption.免費玩Flock APP玩免費免費玩Flock AppFlock …

RedPhone makes private communication simple. Free, world-wide, end-to-end encryption for your calls, securing your conversations so that nobody can li …