One Template for All Custom Post Types
Lets every custom post type use a shared archive-custom and single-custom template before falling back to the general ones, so you design CPT pages once.
Snippet Library
Custom Post Types & Fields snippets for WordPress
Snippets for custom post types, taxonomies and custom fields: register a post type, add meta boxes, show fields in lists and archives. For developers modeling content beyond posts and pages.
Topics Taxonomy Shared by Posts and Pages
Registers a "Topics" taxonomy used by both posts and pages, so related content of either kind can be grouped and listed together.