Random Posts Shortcode
Adds a [random_posts] shortcode that lists a few random posts, optionally from chosen categories or another post type, without running a slow random database query on every page view.
Snippet Library
Content snippets for WordPress
Snippets that add to or change your posts and pages: reading time, author boxes, “last updated” notes, content after the post or after a paragraph, and excerpt tweaks. For bloggers, publishers and anyone who wants richer posts without editing theme files.