chrisnorthwood

Pretty simple, really. Adds a new type of feed you can subscribe to. Simply 
add <code>?feed=json</code> to anywhere you get a normal feed to get it in JSON form 
(but with a cutdown version of events).
Version 1.1 added support for JSONP. To get a JSONP response instead of a 
normal JSON structure, simply add <code>jsonp=callbackName</code> to your query, where 
 callbackName is the name of the function to be wrapped with.
To use this with jQuery, you’ll want to do something like:
<pre><code>$.getJSON("http://example.com/feed/?feed=json&jsonp=?",
 function(data){
 console.debug(data[0].title); // print title of first item to firebug console
 });
});
</code></pre>
(thanks to Dan “Tack” Trudell)

JSON feed

Pretty simple, really. Adds a new type of feed you can subscribe to. Simply

Signalfade

Adds a new type of feed you can subscribe to. 
 http://example.com/feed/json or <code>http://example.com/?feed=json</code> to anywhere and you’ll get JSON back.

JSON Feeder

Adds a feed based on the jsonfeed.org standard that one can subscribe to or parse.

JSON feed vs JSON Feeder