WordPress plugin that allows items in the Media Library to be assigned to a category.
The frontend search form is available as a rewrite URL (requires a permalink structure to be defined); the default URL is http://www.YOUR_DOMAIN_HERE.com/mediacat-library/. You can change the rewrite URL under Settings -> Media Category Library. If you don't use a permalink structure, you can access it here: http://www.YOUR_DOMAIN_HERE.com/?mediacat_library=1
Create a directory named media-category-library in your theme directory and then copy the 3 HTML templates (search.php [search form], list.php [search results], and shortcode.php [shortcode output]) from the plugin's views directory into that new directory. The plugin will use the HTML templates in your theme instead of the ones found in the plugin's views directory.