danielpataki

The Author RSS Widget is very similar to the default RSS widget but offers author-specific RSS feeds. This means that you can display the RSS feed of your authors on their author archive page or posts that they’ve written.
<h4>Usage</h4>
The plugin gives you 5 options to tweak. The “Title” and Items To Show” options should be pretty self-explanatory. The former controls the widget’s title, the later controls the number of items displayed from the feed.
The “Field Name” option is needed because there is no built-in way to add an author’s feed URL to WordPress. Author RSS Feed needs to know how you saved this data to the database. Add user meta field name you are using here.
There are a number of ways to add additional fields to the user edit screen, I recommend <a href="https://wordpress.org/plugins/advanced-custom-fields/" rel="ugc">Advanced Custom Fields</a>. Once you’ve added a field to the User Form make sure to use the generated “Field Name” here in Author RSS Field.
The “Default Field URL” setting can be used as a fallback. If an author’s feed can not be found or the widget is displayed on any other page than the author archive or single post page, this URL will be used. It may be left empty, in which case the widget will not be displayed at all. This is useful if you either want to show the author’s RSS feed, or nothing at all.
The “Show Feed On” setting controls when the author’s RSS field overwrites the default RSS field. This allows you to show the author’s feed on his/her author archive, but not on single post pages.
<h4>Thanks</h4>
<ul>
<li><a href="http://fortawesome.github.io/Font-Awesome/" rel="nofollow ugc">Font Awesome</a> for the plugin icon</li>
</ul>

Author RSS Feed

A widget which lets you show different RSS feeds for your authors on their author pages and posts.

Automattic

Daniel Bachhuber

Gary Jones

Mohammad Jangda

Assign multiple bylines to posts, pages, and custom post types via a search-as-you-type input box. Co-authored posts appear on a co-author’s archive page and in their feed. Co-authors may edit the posts they are associated with, and co-authors who are contributors may only edit posts if they have not been published (as is core behavior).
Add writers as bylines without creating WordPress user accounts. Simply <a href="https://github.com/Automattic/Co-Authors-Plus/wiki/Creating-and-editing-guest-authors" rel="nofollow ugc">create a guest author profile</a> for the writer and assign the byline as you normally would.
On the frontend, use the <a href="https://github.com/Automattic/Co-Authors-Plus/wiki/Template-tags" rel="nofollow ugc">Co-Authors Plus template tags</a> to list co-authors anywhere you’d normally list the author.
For more detailed documentation refer to <a href="https://github.com/Automattic/Co-Authors-Plus/wiki" rel="nofollow ugc">the GitHub Wiki for this plugin</a>.
Co-Authors Plus is an almost complete rewrite of the <a href="https://wordpress.org/plugins/co-authors/" rel="ugc">Co-Authors</a> plugin originally developed by Weston Ruter (2007). The original plugin was inspired by the ‘<a href="https://txfx.net/2005/08/16/new-plugin-multiple-authors/" rel="nofollow ugc">Multiple Authors</a>‘ plugin by Mark Jaquith (2005).

Co-Authors Plus

No support at all , also it doesn't work with wpml

No Support - Not compatible with WPML

Not working

Works!

I rarely ever give 1 star reviews, but developers who take over a plugin - making a breaking change that took a while to resolve - and then refuse to follow standard practice by providing a changelog (despite requests) for future updates, cannot be trusted.

Avoid at all costs.

Cannot trust developers

Assign multiple bylines to posts, pages, and custom post types with a search-as-you-type input box.

Author RSS Feed vs Co-Authors Plus