Taptalk - Personal video and photo messaging
Wickr - Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender...
Vine Messages - Fun & easy video conversations with friends
Confide - On the off chance that you need to get your messages private and encoded then utilize Confide that will fill in as your own and classified courier.
StealthChat - StealthChat is Encrypted, Private, Secure Calls and Chats on Android and Apple iOS
Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.