StandaloneStack 2 is a freeware, portable tool and you can create any number of stacks, for example stack for My Document, Download location, etc.
Here is a simple example to create a Stack.
Download, unzip and run the program. Create a new stack by clicking ‘New Stack’; give a stack name (for example ‘Download’).
Select the path of your ‘Download’ folder and click on ‘Create a Stack’ button and then click on ‘Create a shortcut on desktop’ button. That’s all.
Now you can easily navigate through your download folder by just clicking on the Stack you just created. Download the program from here.