tubaguy50035

Put meta fields in attachment settings meta box.
Copy custom_attachment_fields.php_copy to custom_attachment_fields.php, alter the array to add the fields you want, profit.

Attachment Meta

Put meta fields in attachment settings meta box.

Sergey Biryukov

Allows to find all posts where a particular attachment (image, video, etc.) is used.
Adds a “Used In” column to the list view in Media Library, as well as to the attachment details modal.
Finds posts that use the image (including any of its intermediate sizes) in post content, or as a featured image. Works with custom post types too.
Inspired by a <a href="http://wptavern.com/the-problem-with-image-attachments-in-wordpress" rel="nofollow ugc">WP Tavern post</a> on image attachments.

Find Posts Using Attachment

Allows to find all posts where a particular attachment is used.

Attachment Meta vs Find Posts Using Attachment