AutoBookmark plug-in for Adobe Acrobat
http://www.evermap.com/autobookmark.asp
http://www.evermap.com/downloads.asp
30 day trial, no visible watermarks added after linking.
Similar to Debenu but with even more options e.g. there is offset for pages, so if the page with arabic 1 in the book is the page 20 in the pdf we can add 19 for compensation; at linking the TOC it will link both the text and the numbers.
As with Debenu there were mistakes at number' recognition (up to 10% sometimes) for scanned pdfs ocr-ed with ClearScan(Adobe's OCR mode for smaller pdf files), whereas pdfs ocr-ed as exact-image were again o.k., as were non-scanned (vector) pdfs too, of course; so if we want a better recognition result with index files we can simply use exact-image OCR mode just for the index pages or Abbyy Finereader's text-and-picture-mode, retaining Clearscan for other pages in the document.
It is also helpful (in the case of poor recognition of numbers in the scanned pdfs) that by using underlining option, there will then be visible a two separated lines e.g. for the number 120, a very short one under 1 and a longer one under 20, so we know that we should enter that page number manually rather than to follow the wrong link(s), and also if we would like, we can edit those wrong links later.
http://www.evermap.com/autobookmark.asp#StartLinks
http://www.evermap.com/abm_lnk_summary.asp
The Youtube lesson explains how to automatically create links in Adobe PDF document using 3 options in the "Generate Links" feature of AutoBookmark plug-in: linking text "page N" to Nth page; linking numbers to pages and linking Table of Contents to pages.
https://www.youtube.com/watch?v=ZoIBGVLc-8M