Notice Box Shortcode
Adds a [notice] shortcode for colored info, success, warning and error boxes that make tips and important warnings stand out in your content.
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.