A simple Wake On Lan application. Stores history of sent packets to save you remembering MAC addresses.
You will need to configure your computer to enable Wake On Lan first.
Please refer to the following links to help you get started with Wake On Lan.
A mini-tutorial for Windows/Debian:
http://android.mafro.net/wol_tutorial.htm
One of the original resources for Wake On Lan:
http://www.depicus.com/wake-on-lan/what-is-wake-on-lan.aspx
The wiki article on Wake On Lan (for the technically minded):