Lowes Iris (now defunked) plugs had a setting which you could set to TURN ON after a certain time after being turned off.
On their updates, they removed this feature, so it might have been a security issue?
But I loved using it for certain things such as restarting my router remotely. If I turned off my plug the router was plugged into, well, I would lose the wifi connection needed to turn it back on. Auto-on after off for ______ min/sec was the resolve.