Sort Admin Lists by Last Modified by Default
Lists recently edited posts first in the admin, unless you click a column to sort differently.
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.
Sortable Last Modified Column
Adds a sortable "Last Modified" column to the Posts and Pages lists so you can see which content was edited most recently.