Waitfor.exe - Windows 2000 Resource Kit Utility
This command-line tool waits until a signal is given across the network. Multiple computers can wait for the same signal. The tool could be useful when testing builds of a piece of software, for example, as the build computer could send out a signal to several computers running WaitFor once the build has completed successfully. On receipt of the signal, the batch file including WaitFor could instruct the computers to immediately start running tests on the build.