any good "wake on LAN" tools?

Does anyone have suggestions for scripts or tools that I can run on a WinXP platform to send Wake ON LAN packets to my Mac?
Carl Witthoft wrote on :

Hi, I'd like to be able to wake my mac (Imac G4 OSX) upon remote calls from other machines on my LAN at home. Does anyone have suggestions for scripts or tools that I can run on a WinXP platform to send Wake ON LAN packets to my Mac? Ditto for tools for one Mac to wake another.

Thanks

Carl