ThemeWidgets!

Rainmeter is a desktop customization platform. Through Rainmeter, you can enhance your Windows computer at home or work with skins: handy, compact applets which float freely on your desktop, much like Windows Sidebar gagdgets, or dashboard widgets for the Mac. Rainmeter skins provide you with useful information at a glance. Its easy to keep an eye on your system resources, like memory and battery power, or your online data streams, including email, RSS feeds, and weather forecasts. Many skins are even functional: they can record your notes and to-do lists, launch your favorite applications, and send your tweets to Twitter - all in a clean, unobtrusive interface that you can rearrange and customize to your liking. »

8GadgetPack makes it possible to use gadgets on Windows 8 / 8.1 / 10.

XWidget is a free desktop customization platform. It’s light, handy with powerful visual widget editor and very subtle animations. The Android page is found here: http://android.xwidget.com/

Moo0 SystemMonitor is a smart free program that shows what is going on with your computer. The program uses a minimal amount of ressources, and you can learn from it where your computer "hangs". You can see your computer under many perspectives, and with the features you can diagnose your computer. You can have as many features as you want open and have them in the way that fits you best on the screen.It could be installed or also have a portable version.

Beautiful set of widgets containing a clock widget, a clock and weather widget, weather widgets, date widgets and toggle widgets, with skins/themes support.

gDesklets is an architecture for "desklets", which are tiny applets sitting on your desktop in a symbiotic relationship of eye candy and usefulness.

Highly customizable, beautiful widgets for your Android home screen. Personalize your Android home screen with highly customizable clock widgets, weather widgets, home...