Windows only: We know you'd never goof around on non-work stuff while you were on the clock, but if you did, it'd be nice if your goofing off tended to (literally) blend right in. Chameleon allows you to assign levels of transparency to windows, blending them into the other windows on your desktop. The idea being, of course, that if something looks less glaringly like itself—a big chat window filled with smiley faces, for instance—it's less obvious. The application worked very well with static and relatively static things like web pages and IM windows, as seen in the screenshot here. I had mixed results with video playback, encountering some weird playback issues when layered over certain windows. For another creative way to hide your goofing off—on the web at least—check out previously reviewed Vanishd web site cloak. Chameleon is freeware, Windows only.