EMCO WakeOnLan is simply an advanced freeware Wake-on-LAN utility capable of performing in networks of any scale, to power up one or any number of remote PCs with one mouse click.
No manual work is required to wake up PCs. The application automatically detects MAC addresses using four different methods and send WOL packets to one or multiple PCs. MAC addresses are then saved to the database, so you can save time and skip detecting them again on next WOL operation. Advanced UI allows you to configure your groups of PCs and wake up all PCs in a group with one mouse click.
Wake-on-LAN (WOL) is a networking standard that allows to power on PC by sending it a network message. There is not a standard implementation for Windows, but many third-party utilities implement Wake-on-LAN to allow wake up for PCs remotely.