The Atom feed web part can be used to create an Atom feed. It must be connected to a data source web part, which will provide data for the feed. It displays a link leading to the feed, which is located at the URL of the page where the web part is placed, with a querystring parameter appended.
Note: Selected transformations work only with Documents datasource.
Help URL: http://devnet.kentico.com/docs/webparts/index.html?AtomFeed_overview.htm