Office 2013, especially the preview version of Office Home & Student 2013 RT that comes with the Microsoft Surface tablet, changes the model for writing add-on programs. There are now Office apps and an Office app section in the Windows Store. Many of these apps are free, but it's easy to see enterprise-oriented apps being developed and charged for. Microsoft's implementation of the apps in Office 2013 is clumsy in some ways, but promising.
First, there's the obligatory step to make sure you actually want the app. This may seem unnecessary for a free app. But, it will be more important when paid apps appear.
Next slide: The clumsy part of the process.
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