wpsuitepro

WSP Post & Taxonomy Subscriptions Lite is designed to keep your audience engaged by providing a seamless way for users to stay updated.
Whether you have a standard blog or a complex site with Custom Post Types (like Products or Portfolios), this plugin handles it all out of the box.
Key Features: 
* Universal Support: Works with standard Posts, Pages, and all Custom Post Types. 
* Taxonomy Subscriptions: Users can subscribe to Categories, Tags, and all Custom Taxonomies. 
* User Dashboard: A professional subscription management area for users using the <code>[wsp_account]</code> shortcode. 
* Dynamic Shortcode: Use <code>[wsp_sub_button]</code> to place a subscription button anywhere in your templates or content. 
* Customizable Emails: Full control over the subject and content for Welcome, Unsubscribe, and Update notifications. 
* Auto-Placement: Automatically appends the subscription button to your content to save time.
<h3>Privacy Policy</h3>
This plugin stores user IDs, email addresses, and subscription preferences in your local WordPress database to facilitate the sending of notification emails. It does not share this data with any third-party services.

WSP Post & Taxonomy Subscriptions Lite

A fully functional, lightweight subscription solution that allows your users to subscribe to updates for any post type or taxonomy on your site.

Amaury Balmer

WordPress 3.1 and up allow for reasonably simple custom taxonomy, this plugin makes it even simpler, removing the need for you to write any code.
Add support for taxonomy with or without hierarchical. Choose the selector type for write post.
Allow to add taxonomy to any objects registered on your installation. This plugin can be coupled with the plugin ACF to a new term meta database that allow to create on fly any field need for the taxonomy. For example, for a “Number” taxonomy, you can add fields : number ID, date of parution, screenshot, etc !
This plugin is developped on WordPress 3.5, with the constant WP_DEBUG to TRUE.
This plugin allows you to add taxonomy just by giving them a name and somes options in the backend. It then creates the taxonomy for you, takes care of the URL rewrites, provides a widget you can use to display a “taxonomy cloud” or a list of all the stuff in there, and it allows you to show the taxonomy contents at the end of posts and excerpts as well. 
To boot, it comes with a set of template tags for those who don’t mind adapting their own theme.
For full info go the <a href="https://github.com/herewithme/simple-taxonomy" rel="nofollow ugc">Simple Taxonomy</a> page.

Simple Taxonomy

WordPress 3.1 and up allow for reasonably simple custom taxonomy, this plugin makes it even simpler, removing the need for you to write any code.

WSP Post & Taxonomy Subscriptions Lite vs Simple Taxonomy