DiskSpy Solid 1.5
DiskSpy Solid is a more advanced version of DiskSpy. In addition to giving users a "software disk LED" that shows local disk reads and writes in the menu bar, this tool also shows network activity in the menu bar. The program will show when a read or write is occurring on any active physical network interface.
Some possible uses include watching reads and writes to network disks, watching a program use the network, or simply testing to see if a connection is working.