LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
ebblink - pick one of your images, upload and get a link back.
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.
1Password Families - Your family’s safe deposit box with a digital 🔑
MyChat - Secure instant messenger for any network
Navisens - Indoor & outdoor location without beacons, WiFi, or GPS