WordPress.org

Scott Taylor

Atom Publishing Protocol support for WordPress is still supported in this plugin. 
Support for Atom was dropped in WordPress core in version 3.5.

Atom Publishing Protocol

Atom Publishing Protocol support for WordPress

SP developer

Syndicate Press lets you include RSS, RDF or Atom feeds directly in your WordPress Posts, Pages, Widgets or anywhere in your theme. Syndicate Press features an easy to use admin page and includes great features such as feed caching, filters and numerous display options.
Unlike a number of other news syndication plugins for WordPress, Syndicate Press does not force arbitrary formatting or CSS styling on the feed contents. This allows the feed items to be displayed in your site like they are a fully integrated part of your content.
Syndicate Press is actively maintained and regularly updated with new features and enhancements. The Syndicate Press development team at <a href="http://henryranch.net/software/syndicate-press/" rel="nofollow ugc">henryranch.net</a> has focused on ease of use, performance, stability and functionality to bring you a great plugin that will help keep your WordPress site up to date with the latest in news feeds from every corner of the world.
<h3>Arbitrary section</h3>
Please see the following pages for examples of the syndicated news feeds on a WordPress blog:
Usage information: http://syndicatepress.henryranch.net/documentation/usage/

Syndicate Press

Syndicate Press lets you include RSS, RDF or Atom feeds directly in your Wordpress posts, pages, widgets or theme.

Atom Publishing Protocol vs Syndicate Press