You can message and share files inside your intranet without a server.
Berty is a secure peer-to-peer messaging app
Chat Messenger. E-Mail-Client. Websearch. Filetransfer.
Lightning fast peer-to-peer cross-platform messenger
P2P social network
A small, reliable, local network messenger that doesn't need internet
An intranet chat application that does not require a server.
Video live support solution for unlimited departments and moderators.
P2P instant messenger
A P2P Messenger which uses JXTA. It provides secure RSA/AES end-to-end