Ping Pong is a Mac OS X application which continuously checks if specified remote hosts are available and notifies You if they are down (and if they are Up again). You can select how often you want "ping" to happen, choose method of notification (visual, voice, email, etc.).
If you need to monitor a busy server which doesn't always respond in time you can specify the number of lost packets which is tolerable.
Ping Pong is a shareware. Unregistered version will only let you monitor a single server.
Screenshots
During the normal Operation, Ping Pong is just a little icon in your menubar:
Screenshot of Ping Pong application
And when it needs to notify you about something it tries to Stay as unobtrusive as possible:
Screenshot of Ping Pong application
System requirements
* Mac OS X 10.4
* Intel or PowerPC mac
* Network connection
Universal Binary
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License fee: 5 Euro. All updates are free for registered users
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