The Serval Mesh - It works by using your phone's Wi-Fi to not communicate with other phones on the same network.
LuckyCrush - Live random video chat
Briar - Secure messaging, anywhere
Omegle - Omegle is one of the most popular online chat website allowing user to communicate with anyone without registration.
WorldChat - Meet new people around the World on WorldChat.tv, the Original World Chat since 2011.
Germany Chat - Germany Chat app enables users to make new friends so they can spend their extra time while chatting with them.