A plug-in for use with Adobe Acrobat.
DogEars is a desktop publishing tool for use with Adobe Acrobat for marking pages within a document so that you can quickly flip back to them when you require.

Marking an electronic file with dog-ears is analogous to folding pages down in a physical book to mark your place.
Once you mark a page with a dog-ear a symbol representing a turned-down page is placed on the top-right of that page.

As well as using dog-ears to help you locate specific pages within a document quickly and easily, you can also extract all the pages on which dog-ears have been set into a new separate PDF document. (These pages will still remain in the original file too.) All pages that have not been marked with a dog ear will be omitted.