I use
Direct Folders as a productivity tool. It includes a feature, RIGHT CLICK the Close Button (upper right corner) to toggle always on top function.
RIGHT CLICK the Min/Max button will roll window into its Title Bar.
RIGHT CLICK or Double Click the Desktop (or blank Explorer pane) for a user defined directory/app "jump list".
Free. 64-bit version available. 2 or 3 meg memory. Pro version available.
One of my "must have" apps.
From the makers of TeraCopy, with which I have a love/hate relationship. This app needs an update for Windows 7, IMO.
Just don't forget you set a window on top - freaky when you forget, like I just did. Zig but no zag ;-)