Skippy-XD

Basically

You know that thing Mac OSX, Compiz and KWin do where you press a hotkey and suddenly you see miniature versions of all your windows at once? Skippy-XD does that. It's most commonly known by Mac OSX's name for it - Exposé.

Demo

Screenshot taken from demo video at http://www.youtube.com/watch?v=gVRPCd7OS38

Technically

So why do I want Skippy-XD instead of Mac OSX, Compiz or KWin? Well many Linux users prefer a lightweight, speedy desktop environment like XFCE, LXDE or their own Openbox-based hodge podge. Many even appreciate that these environments don't have compositing because it can degrade performance in some applications (especially 3D applications).

Skippy-XD is a standalone application for providing a window picker with live previews (including live video) on Linux desktops that run an X server with compositing support. That means it's not baked into the window manager, and the compositing is not being used all the time. So the performance of you're window manager isn't degraded, but you still get a window picker that's every bit as pretty as OSX's Exposé or KWin's "Present Windows", with all the desktop-navigational efficiency. Compositing only takes effect when you press the hotkey to display the window picker.

Do I Care?

If this all sounds useless to you, or you've never had any inclination whatsoever to try Openbox instead of KDE, then you can probably quit reading now and do something else. But if you're sick of having to choose between speed and stability or glitz and navigational features in a Linux window manager, this is a good solution.