Not sure why you want this rather than a list of the templates on your computer in the User Templates and Workgroup Templates folders.
See this thread on the MS Answers forum.

Otherwise, it is possible to modify the Ribbon and actually give you one or more menus for your templates, but this is not a simple project. Customize the Ribbon (It doesn't take rocket science)

I have menus on my Ribbon that give a list of all templates in a given folder and start new documents from those templates when they are selected.