HostsMan - HostsMan is a freeware hosts file manager and editor. Built-in hosts file updater
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Gas Mask - Gas Mask is simple hosts file manager for Mac OS X.
MyChat - Secure instant messenger for any network
SwitchHosts - Free and open source hosts management & switching app
BORGChat - BORGChat is a LAN messaging software program.