Triweb Digital

This plugin injects a small search box at the top of taxonomy metaboxes (the checkbox lists) on the post edit screen. It only appears for taxonomies that have more than 5 terms to avoid clutter.
Search queries are performed via AJAX and the checklist is filtered client-side for a quick, responsive experience.

Taxonomy Admin Search

Adds an AJAX-powered search box to taxonomy metaboxes on the post edit screen when a taxonomy has more than 5 terms.

ivycat

Brady Vercher

Eric Amundson

AJ Mallory

anvilzephyr

Patrick Jackson

Easily add one or more posts to any page using simple shortcodes.
Supports categories, tags, custom post types, custom taxonomies, date ranges, post status, and much more.
You can get all of the same functionality provided by this plugin by modifying your theme’s template files; this plugin just makes it easy for anyone to pull posts into other areas of the site without having to get their hands dirty with code.
Plugin is depending upon your theme’s styling; version 1.x of this plugin does not contain native styles.
This is a minimal plugin, function over form. Give us feedback, suggestions, bug reports, and any other contributions on the in the plugin’s <a href="https://github.com/ivycat/posts-in-page" rel="nofollow ugc">GitHub repository</a>.

Posts in Page

Easily add one or more posts to any page using simple shortcodes.

Taxonomy Admin Search vs Posts in Page