Rainmeter 2.2 for windows 

Rainmeter displays customizable skins, like memory and battery power, RSS feeds ... Supported: 32bit and 64bit versions of Windows XP (SP2+), Vista, 7, and 8.
Rainmeter is a desktop customization platform. Through Rainmeter, you can enhance your Windows computer at home or work with skins.
Rainmeter is a handy app for tweaking your desktop.

Rainmeter is the ultimate desktop enhancement application. With over thousands of skins available, one can style their desktop as they want to. I generally use it to monitor my gmail account, browse through RSS feeds, quickly launch apps and save notes (which is snyc-ed with Kunal using Dropbox, so we can collaborate together on posts efficiently).

In this post, I'm sharing 18 Rainmeter skins (or themes) that I've used and think that they're the best available around:
                        

                                         Download here