Karl-Heinz Klug

A very simple widget which shows all your categories with number of posts togehther with RSS Feeds for each category in your WordPress sidebar.
Find more infos about Bibs Feed Cat Widget at <a href="http://wp-ezine.com/bibs-feed-cat-widget_25300.html" rel="nofollow ugc">WP Ezine</a>

Bibs Feed Cat Widget

Places a Widget with categories and feeds for each category in your sidebar

wokamoto

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 you get a JSON form. 
 http://example.com/feed/json?callback=callback or <code>http://example.com/?feed=json&callback=callback</code> to anywhere you get a JSONP.

Feed JSON

Adds a new type of feed you can subscribe to.

Bibs Feed Cat Widget vs Feed JSON