Glide 3 - Lightning fast live video messaging
Snapchat - Real-time picture chatting
Quickie - 3-60 second video calls with your friends
Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
Adobe Voice - Tell better stories with animated videos
StealthChat - StealthChat is Encrypted, Private, Secure Calls and Chats on Android and Apple iOS