Screen Popup is a small program that allows you to send an instant global popup message to all PC's on the internal network. Unlike a lot of similar applications, this does not use the Windows Messenger service so will work on Windows XP and 7. It will also display the popup message on all PC's no matter which subnet they are on.
This requires a server or PC shared folder to be available. Comes with full instructions, but may need a little technical experience.
Requirements:
· Net Framework 2.0 with SP1