Screenlets are small applications for the Linux desktop, similar to widgets on the Mac OS X dashboard. They allow users to quickly access information and control their system in various ways. For example, one can use Screenlets to display a clock or calendar, monitor system resources such as CPU and memory usage, and control applications such as media players or instant messaging clients. Screenlets can also be used to create custom interfaces, such as a personalized news feed, or a set of virtual buttons to control applications.
this is for hardware monitoring only.