Internet connection is not needed to use this freeware.
Brosix Messenger is a free peer to peer chat software.
It is specially made for use in the office environment.
It can also give delivery reports for those messages which you sent.
There is no need to configure your ip or various network details to start this freeware.
Its main features are notes, reminder, remote desktop sharing, file transfer, voice chat, group chat and instant messaging etc. Lan Messenger is a free p2p chat software for your PC.