Snapchat - Real-time picture chatting
Bolt - Bolt is an open source Content Management Tool, which strives to be as simple and straightforward as possible. It is quick to set up, easy to configure, …
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.
Vine Messages - Fun & easy video conversations with friends
StealthChat - StealthChat is Encrypted, Private, Secure Calls and Chats on Android and Apple iOS
Mirage - Mirage is a fast and simple GTK+ image viewer.