SnapTalk 5.0.3 (Mac)
Source: Glass Bead Software
SnapTalk provides instant chat, and file transfer on your Mac and/or Windows LAN. SnapTalk installs in less than a minute and requires no administration, configuration or, server. Features include auto-compression of attachments (files and folders), conversation archiving, SnapBacks, AutoReplies, Groups, "while you were out" messages, message encryption and much more.