you can add a link to the applications folder to the right hand side of the dock.
go to your finder, navigate to the applications folder (don't use the link in the sidebar) and drag the folder to the right hand side of the dividing line on the dock.
You now have a direct link to your app folder. if you right click (control click if you havent enabled the right button function) you can choose from
Fan
Grid
List
or
Automatic.
I chose list because you can quickly navigate to any app (its like a more streamlined version of windows start menu)
stacks is just the term for how the folder is displayed, either as a folder icon or as a "stack" of icons, i.e. all the contents stacked ontop of each other.