LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Imoji - Turn selfies or any photo into stickers you can text
MyChat - Secure instant messenger for any network
MailPort - Send your MailChimp newsletter to Facebook Messenger
BORGChat - BORGChat is a LAN messaging software program.
ScribbleBoard - iOS8 Keyboard for hand drawing your messages