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

David Shanske

mantonr

Daniel Jalkut (Red Sweater)

Adds a JSON Feed to your WordPress site by adding <code>/feed/json</code> to any URL.
The JSON Feed format is a pragmatic syndication format, like RSS and Atom, but with one big difference: it’s JSON instead of XML. Learn more at <a href="http://jsonfeed.org/" rel="nofollow ugc">jsonfeed.org</a>.

JSON Feed (jsonfeed.org)

This plugin is simple to install, adds no weight to your site, and does what it says on the tin.

Bibs Feed Cat Widget vs JSON Feed (jsonfeed.org)