Gas Mask - Gas Mask is simple hosts file manager for Mac OS X.
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
SwitchHosts - Free and open source hosts management & switching app
MyChat - Secure instant messenger for any network
BlueLife Hosts Editor - BlueLifeHosts editor is a Portable freeware application for editing windows Hosts file ,(easily add/delete , Block , Update domain names)
BORGChat - BORGChat is a LAN messaging software program.