WakeOnLAN
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Portable version
It would be great if there is a portable version of this application.
I'm actually surprised there isn't one, nor does it use an installer which lets you simply extract the contents. I've had to look for alternative tools.
I think there are a few things causing limitations on a completely portable version - notably the way that schedules and passwords interact with the systems that they are run on.
For example, I believe that if a username/password is required for shutting down a system(s) then that password is hashed and only available to the system the password is entered into. If you move the WOL database xml file to a different PC all those hashed passwords fail.
Similarly with scheduled tasks. There seems, at least currently, no straightforward way to export and import scheduled activities let alone run them on arbitrary machines.
I use WOL from multiple IT Admin workstations and have found I can mostly get the functionality desired if I host the WOL database xml file on a fileshare. In this way I can access it easily from multiple places, but one has to remember not to try to manipulate passwords nor schedules. I have a 'master' workstation that does the heavy lifting for passworded shutdowns and maintaining schedules.
If all you need is a really simple interface to start and stop single machines in an ad-hoc way then yes, this tool is probably overkill and perhaps less flexible as a result, or at least insofar as portability goes. I use it to help me maintain LAN's full of machines.