This plugin extend media library capabilities and show in one page what pictures are attached to a post/page. After installing the plugin you will see two new menus in Media menu from backend. First one is for images attached to posts and second one is for images attached to pages.
The main advantage of this plugin is that if an image is removed it will disappear from post/page attachments page.
This plugin solve the Wordpress Media Library problem where you can see only one post/page even if that image is attached to more than one post/page. Also if an image is removed from the post that image will still occur to be attached to that post.