LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Telegram - Telegram is a messaging app with a focus on speed and security. It’s superfast, simple and free.
MyChat - Secure instant messenger for any network
Facebook Messenger - Facebook Messenger is a faster way to message.
BORGChat - BORGChat is a LAN messaging software program.
WhatsApp - WhatsApp Messenger: More than 1 billion people in over 180 countries use WhatsApp to stay in touch with friends and family, anytime and anywhere.