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These programs allow for parsing of XML data with specific tags, designed to display simple information from a web server - often a summary of the latest stories or articles of the day. Can also be used to link against hosted audio files to create podcasts, which are then treated as a series of episodes. There exist a number of useful classes within Cocoa that, when tied together, allow a programmer to easily create a news reader. This is a good idea for a newbie to try, since it’s relatively simple compared to an app like Keynote, yet covers more than a simple text editor - think “intermediate Cocoa”.

See more info in the wikipedia article:

For an example of a feed you could check out in your aggregator, see CocoaDevRSSFeed.

Here is a list of the more popular readers, made in Cocoa on the Mac, so far:

Vienna, open source, Cocoa:




Postino ( )


… and here is an interview with the authors of these apps:

Some of these apps also support Atom in more recent versions.

An article (though rather old) on O’Reilly also covers some of these:

MiNews is also another (free) RSS Reader ( )