Dark Mode for wp-admin (Per User)
Adds a "Dark mode" checkbox to each user's profile that switches the whole admin area to a dark look, with images and videos kept in their real colors.
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.