WolMan is a GUI tool that allows you to use the Wake-on-LAN feature of many NICs. It is to be used under Linux, it is written in C++ and uses Qt 4.
The up-to-date source code can be fetched from the Git repository:
git clone git://git.dolezel.info/wolman.git
Generate a Makefile by running
qmake-qt4, then compile using
make. The program requires the libpcap and libnet libraries; also make sure that you have iproute2 installed. The binary has to be run with root priviledges or must be granted the setuid root attribute.