roganty

Set a default thumbnail using either an image from your image gallery or use your gravatar for posts with no thumbnail set.
This plugin requires your theme to have support for post thumbnails enabled. 
Although no extra code needs to be added to your theme, some alterations might be required for trouble free usage.

Default Post Thumbnail Image

Set a default thumbnail using an image from your gallery or use your gravatar for posts with no thumbnail set

yoren

Yoren Chang

This plugin is made for:
<ul>
<li>Search through all fields in Media Library, including: ID, title, caption, alternative text and description.</li>
<li>Search Taxonomies for Media, include the name, slug and description fields.</li>
<li>Search media file name.</li>
<li>Use shortcode <code>[mse-search-form]</code> to insert a media search form in posts and template files. It will search for media by all fields mentioned above.</li>
</ul>

Media Search Enhanced

Search through all fields in Media Library.

Default Post Thumbnail Image vs Media Search Enhanced