Luis Rock

Master IDs plugin offers an easy way to find any post type ID. You just need to choose the post type wanted (page, post or any custom post type) and you will see all posts related, with the their respectives Titles and IDs, in a dropdown list.
Master IDs is also great for showing how many posts you have under each Post Type.

Master IDs

Find any post type ID (Post, Page or CPT) in a dropdown list.

There are times that you need to know the ID number of a page or post in WordPress and it can be more painful than it should be to find that number. This plugin does one simple thing: it displays the ID number of the page, post, category, or tag you are looking at in the WordPress Admin Bar. It appends this ID to the edit menu already on the Admin Bar. Needless to say, that means that this plugin is only useful for WordPress version 3.1 or above, since the Admin Bar was first introduced with 3.1.

Admin Bar ID Menu

Makes the ID number of the current page or post visible in the Admin Bar.

Master IDs vs Admin Bar ID Menu