Omegle - Omegle is one of the most popular online chat website allowing user to communicate with anyone without registration.

Facebook Messenger - Facebook Messenger is a faster way to message.

Emerald Chat - An omegle alternative on the web with several enhanced features.

Adium - Adium is a free instant messaging application for Mac OS X that can connect to AIM, MSN, Jabber, Yahoo, and more.

BlaBla.Cam - BlaBla.Cam is basically Omegle or a Chatroulette reimplemented with the latest web technologies. It offers a simple and lightweight user interface that works on both computer and smartphone, and which can optionally be installed as an application.

Caprine - Elegant Facebook Messenger desktop app