Rainmeter

Rainmeter (not Rainlendar) is a desktop widget system.

Why do I use it?  It’s very lightweight, and allows for HUD-like functionality–as if all data (e.g. time, date, weather, CPU usage, memory usage, swap usage, etc.) is part of the background.

Dandelions not included.

This was made using some random (possibly Mac-originated) background, some icons, and Rainmeter.  I used the 10-foot HUD, Enigma, and HUD.Vision configs.