Downloading QuickPopUp X 4.5 for Mac from our website was free. The software lies within Internet & Network Tools, more precisely Network tools. This software for Mac OS X was originally designed by Kanex Group, Inc.
From the developer:
QuickPopUp X (previously MacPopUp) is a program that allows Mac users to exchange instant messages with other users on any local area network (LAN).
You may want to check out more software for Mac, such as attach, which might be related to QuickPopUp X.
Instant messaging