NetDispatch is a freeware app, designed to send single, non-replayable, messages to many computers at once.
Features:
- Instantly send messages to any number of computers.
- Store the message file on your local network or a global Web server.
- Store the message file in Dropbox.
- Check for messages at up to six different URLs.
- Add a "More Info..." button to your messages, that links to a webpage.
- Change how often NetDispatch checks for new messages.