Different Single Post Template per Category
Lets a classic theme use single-cat-{slug}.php for posts in a given category, for example a recipe layout for posts filed under Recipes, falling back to the normal template.
Snippet Library
Developer snippets for WordPress
Snippets for developers: debugging helpers, custom cron schedules, body classes, REST API tweaks and admin tools for checking hooks and queries. Building blocks for people who write code for WordPress every day.
Register Extra Menu Locations
Adds new menu locations, such as a footer menu and a legal links menu, that you can assign under Appearance > Menus and print with wp_nav_menu() in a classic theme.
Register Page Templates From a Folder Outside the Theme
Adds every PHP file in wp-content/page-templates/ to the page Template menu of classic themes, so custom layouts survive theme switches and updates.
Show the Template Parts Used on a Page
Adds a "Template parts" menu to the front-end admin bar for administrators listing every template part loaded on the page, for both classic themes (get_template_part) and block themes.