Limit Posts to a Single Category
Keeps every post in exactly one category: when several are ticked, only the most specific one is kept on save, which keeps URLs, breadcrumbs and archives tidy.
Snippet Library
Admin snippets for WordPress
Snippets that tidy up and tailor the WordPress admin: hide menu items, add columns to post lists, change the footer text and remove clutter. Made for agencies and site owners who hand a dashboard over to clients or editors.