jNetMap 0.5.3 Description:
jNetMap is an utility that will ping all registered devices every x minutes, updating it's status according to the result of the ping. Alternatively you can also monitor a specific port, such as port 80 for webservers. Available devices are green, unavailable devices are red. Gray means "unknown" and orange "not found". To start drawing a new map, select "add", enter the details and hit enter. You can connect the devices by right-clicking on a device and selecting "connect". The rest is pretty self-explanatory I guess... You can also save and open existing maps so you don't have to redraw everything.