Export and import excel data to and from a dictionary or CDT in the UI

I have two requirements that I am not sure how to tackle:

1. I need to to export a datasubset, dictionary, cdt, or map to excel (basically data that is in appian, not in the db) in an interface.

2. I need to upload an excel spreadsheet, and extract the data to display in a grid in the UI.  So I need to extract it to a datasubset, dictionary, cdt, or map.

Is there any OTB functionality or plugin that could achieve one or more of these requirements? 

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