Free Gems: Camouflage
Sometimes the simplest tool can be a huge help. Camouflage is a menubar app that hides files on the desktop with a single-click or hotkey-stroke. For me, this is incredibly useful for documenting when a screenshot involves the desktop. This particular scenario forces me to either clean up my desktop (a chore in itself) or use TinkerTool to quit the Finder temporarily. I can just forget about the first option and the second one doesn’t feel healthy. Now, with Camouflage, I can fade the icons with a Command+Option+Control+H—my hotkey of choice.

would be great if there would be a preference for the dock to hide as well! so it would be more of a presentation mode!
Great find! This will be great for when I’m teaching and I don’t want to show my desktop files. Which I try to keep few on there. They really should re-name the app Destroy Desktop.
This is great. I’ve been looking for similar solutions and am also drawn to Layersapp.com*, which makes all the elements on your screen .psd layers—so you can simply hide Finder Icons. Though, as Chris P stated, that wouldn’t be so helpful for teaching.
*I’m also testing LittleSnapper for advanced screengrabbing, but I’m not sure it has any hide functionality (just blurring).
@andremore — Layers is a fantastic app that I wish I’d be able to use more. It’s actually the first small app I bought a license for. I’m sure it’ll come in handy one of these days.
@Chris — I’d have to sue them if they named it that.