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.

ShareAccount - Share your account without giving out your password

MyChat - Secure instant messenger for any network

Wing-project.org - WING - Wireless Mesh Network for Next-Generation Internet

BORGChat - BORGChat is a LAN messaging software program.

Callio by Netguru - Never miss a call from your client or prospect