Tired of navigating through different subfolders to reach that specific directory you were looking for ? Saving an image from the web to a certain directory takes you over 1 minute ? Stop looking for the same folders over & over again, let me introduce Dirkey.
Dirkey is a small utility that enables you to define bookmarks for folders and go back to these bookmarked folders from within File Open/Save dialogs and Windows Explorer. You can set and go to these bookmarks using your keyboard or your mouse. When Dirkey is active you can press Ctrl+Alt+0..9 in e.g. an Open/Save File dialog and a bookmark will be set on the current folder. You can go to any bookmarked folder by using Ctrl+0..9 in the same or another supported window. All bookmarks are global and are preserved when you turn your computer off. You can also open bookmarked folders in a new Explorer window.
Source : Dirkey Homepage