Microsoft Office Interactive Developer Map made with WPF Installed via ClickOnce

Microsoft Office Interactive Developer Map is made with Windows Presentation Foundation (WPF) and is installable via ClickOnce.

Overview (from MSDN install page)
The Microsoft Office Interactive Developer Map is a Windows Presentation Foundation (WPF) application that helps developers visualize the different programs, servers, services, and tools that will help them build solutions. It allows them to drill down to each product and technology and learn about new features, objects, Web services, namespaces, and schemas required to extend Microsoft Office and build custom Office Business Applications (OBAs).

Read about it and get it here.