Jonny Harris

This is a simple plugin designed to make it super easy to add custom post types RSS feed into a theme. This plugin automatically queries post types that have archives enabled and generates a markup and adds it to head.
Read more about this plugin at it’s <a href="http://www.jonathandavidharris.co.uk/scripts/custom-post-type-rss-feeds/" rel="nofollow ugc">homepage</a> .
All check out the development version on github. <a href="https://github.com/spacedmonkey/custom-post-type-rss-feed" rel="nofollow ugc">https://github.com/spacedmonkey/custom-post-type-rss-feed</a>

Custom Post Type RSS feed

This is a simple plugin designed to make it super easy to add custom post types RSS feed into a theme.

Stephanie Leary

This is a utility for converting lots of posts or pages to a custom post type (or vice versa). You can limit the conversion to posts in a single category or children of specific page. You can also assign new taxonomy terms, which will be added to the posts’ existing terms.
This plugin is useful for converting many posts at once. If you’d rather do one at a time, use <a href="https://wordpress.org/extend/plugins/post-type-switcher/" rel="ugc">Post Type Switcher</a> instead.

Convert Post Types

Wordpress 4.9.5

No better plugin for converting categories to custom post types. And vice versa.

Still works great

A bulk conversion utility for post types.

Custom Post Type RSS feed vs Convert Post Types