Azure Application Architecture Diagrams

Info from: DEV205x Course Info | edX (free course: Architecting Microsoft Azure Solutions)
Application Architecture on Microsoft Azure
Microsoft architecture Blueprints



The Blueprints use the Cloud and Enterprise Symbol Set.
Download Microsoft Azure, Cloud and Enterprise Symbol / Icon Set - Visio stencil, PowerPoint, PNG from Official Microsoft Download Center



Microsoft Software Architecture Diagrams and Blueprints (3D)
"Scenario-based diagrams that help you build new solutions fast"

Download Microsoft 3d Blueprint Visio Template from Official Microsoft Download Center

Visio Guy: a lot of useful info about MS Visio

Azure Infographics - Building real-world cloud apps

There are similar icons available free from Amazon Web Services:

AWS Simple Icons



and on the "open web":

Icon Archive - Search 590,918 free icons, desktop icons, download icons, social icons, xp icons, vista icons