PDF Index Generator is a powerful indexing utility for generating an index from your book and writing it to your book in (4) easy steps. PDF Index Generator parses your book, collects the index words and their location in the book, then writes the generated index to a PDF or a text file you specify. The main target for PDF Index Generator is to automate the process of generating the book index instead of doing the hard work manually.

• PDF Index Assistant 3.0
  PDF Index Assistant, a Windows utility designed to create and search in index of Adobe Acrobat PDF files. PDF Index Assistant supports indexing of popular Adobe Acrobat PDF...

• Elite Index and Concordance Creator 2.0
  Elite Index and Concordance Creator automatically generates an index for PDF documents, through Indesign, MS Word, and others