This looks like a great tool for creating interaction and adding multimedia to PDF content. Free for materials up to 500 page.
Turn your vision into reality by creating your own version of an existing PDF or textbook. Give it a dynamic touch, jot down notes, add video/audio clips, and discuss materials with your readers within your interactive content. Use Active Textbook to learn, teach or simply share your documents online – it’s easy!
Phi Beta Iota: This has huge potential for “just in time” education and for the advancement of Standard Operating Procedures and all forms of organizational handbooks, manuals, regulations, etcetera.