Softros LAN messenger - LAN messenger for an internal office chat for home or business users. It does not require a server and is very easy to install and use. It supports personal chats, group chats, message brodcasting, files transfer and remote desktop access.
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