Advanced Port Scanner - Advanced Port Scanner is a fast and free software for port scanning.
Dshutdown - Utilities freeware by Dimio, DShutdown, DSynchronize, HDHacker, DTaskManager and DSpeech
WOL Magic Packet Sender - A free magic packet sender for Windows - wake-up computers with the touch of a button.
gWakeOnLan - gWakeOnLan is a GTK+ utility to awake turned off computers through the Wake on LAN feature.
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
SleepTimer Ultimate - Feature rich freeware shutdown timer on Windows and android.