Within the LANDesk product, if you do a targeted multicasting job wake-on-lan messages will be sent by the subnet representative; however this is limited to multicast jobs.
We provide a popular add-on module called Wake-On-WAN that extends this functionality to right-click in the device list of the console and also to normal scheduled tasks including the ability to scheduled and sequence wake-ups, scripts/packages, and shutdowns will greater control over results and user interaction.
The link is in my signature below, so please feel free to take a look.
LANDesk Silver ESP
The One-Stop Shop for LANDesk Enhancements