Konversation - Konversation is an IRC client which gives you speedy access to Freenode network's channels...
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Kiwi IRC - A hand-crafted IRC client that you can enjoy. Designed to be used easily and freely.
Facebook Messenger - Facebook Messenger is a faster way to message.
mIRC - mIRC: Internet Relay Chat client
Digsby - Tagged makes it easy to meet and socialize with new people through games, shared interests, friend suggestions, browsing profiles, and much more.