Omegle - Omegle is one of the most popular online chat website allowing user to communicate with anyone without registration.
Ablo - Say hello to the world
Chatrandom - Chatrandom provides medium to users for having chat at random with different users around the globe.
RoomChat - No sign up chatrooms with just a URL and your handle
LuckyCrush - Live random video chat
Chatterino - Chatterino is a chat client for twitch chat.