BGInfo utility displays information on the desktop, and it works in a server environment as well. Developed by Mark Russinovich
License: Free
Screenlets is both a Python framework to simplify writing Cairo-drawn desktop widgets, similar to those found in the "Dashboard" feature of OSX, and a collection of widgets written using the framework. It is designed to work with any modern Linux desktop. Developed by Rico Pfaus, Helder Fraga, Natan Yellin
License: Open Source
Bginfo is a lightweight Windows utility focused on displaying system information on the desktop, making it ideal for users who need quick access to performance metrics. In contrast, Screenlets offers a more extensive and customizable widget system for various data displays, suitable for users seeking a richer desktop experience.