SmallWindows Portable is a tiny app that minimizes all your open windows so you can easily see them.
Like Mac OSX's Expose feature, SmallWindows Portable means even if your desktop is completely cluttered, a simple hotkey command will clear it up. It is based around the full version of SmallWindows.
The tiny SmallWindows Portable icon sits in the system tray, and can be activate by right clicking and choosing 'Miniture Windows', or more conveniently by hitting a hotkey. Hotkeys can be chosen in the Settings menu.
SmallWindows Portable is a neat tool to have in your USB toolkit, and it's both fast and functional. Not having to install it is a big plus, and it automatically works with dual monitors (or more).
If you often find yourself with far too many windows open, SmallWindows Portable is a neat way to help you find the one you want, without intruding on your work.