This is one of the most useful and ever so customizable tools ever created. Samurize can monitor hundreds of different system statistics and components such as memory, network, processor, harddrive, system temps, local weather, and more. There is also a wide selection of plugins, scripts, and design customizations available giving you the ability to have Samurize setup YOUR way.
If you're a power user like me, and you want complete monitored system stats and info in realtime available to your desktop, with a neat customizable designing ability, this is definitely something you will wanna check out.