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1: Compiz
Compiz is to the Linux desktop as HiDef is to the world of television. Is it necessary? Not at all. Will it enhance your experience? Absolutely. Compiz is a compositing window manager that adds tons of functionality to the desktop — from the stellar Desktop Cube to the various window switchers and everything in between, on top, on bottom, and around the corner. If you haven’t experienced Compiz, you have no idea what the PC desktop can really do.
2: Screenlets
Screenlets are tiny applications that live on your desktop and provide extra functionality. Some of these applets do little and some do quite a bit. My personal favorites are the ring sensors (various sensors for your PC) and CopyStack (a stack of clipboards that allow you to select from your clipboard history as well as drag and drop a “page” of your clipboard onto a document).
3: Emerald
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