Moo0 System Monitor!

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. »

Conky is a free, light-weight system monitor for X, that displays any kind of information on your desktop. Originally a fork of Torsmo, Conkys torsmo-based code is BSD licensed. New code in Conky has been licensed under the GPL 3.0.

How many times have you walked up to a system in your office and needed to click through several diagnostic windows to remind yourself of important aspects of its configuration, such as its name, IP address, or operating system version If you manage multiple computers you probably need BGInfo. It automatically displays relevant information about a Windows computer on the desktops background, such as the computer name, IP address, service pack version, and more. You can edit any field as well as the font and background colors, and can place it in your startup folder so that it runs every boot, or even configure it to display as the background for the logon screen. »

The BitBar app lets you put the output from any script or program right in your Mac OS X menu bar. And it's completely free. An impressive number of plugins have already been contributed by a wide range of developers just like you, and this site makes it easy to find them.

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/

GKrellM is a single process stack of system monitors which supports applying themes to match its appearance to your window manager, Gtk, or any other theme.

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

Theme Widgets has eight small apps that run on your PC desktop. The apps cover different tasks such as: clock, calculator, weather, notes, calendar, timer, stopwatch and a whiteboard. This will hopefully grow over time.

This little application displays system information on your desktop in a similar way to some other desktop information tools. Unlike others, this application looks like wallpaper but stays resident in memory and continues to update the display in real time. Uses very little memory and nearly zero cpu. Perfect for quick identification and walk-by monitoring of production or test server farms. Everything is customisable including language.

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

AlomWare 64: See your PC's stats as a live C64 wallpaper!

Cysboard - A lightweight system monitor similar to conky with html and css for themes