What it is: Sometimes I come across a useful site and think, “how in the world is it possible that I haven’t discovered this before?”  That happened today with Adobe Form Central.  This free web application lets you create pdf’s that are actually web forms that can be filled out directly on the pdf.  Fancy.  Forms Central has a huge bank of templates that you can start with including a section just for education.  These are mostly application, appointment, quiz type forms.  But the best…the ability to create your own custom pdf form! Design items include text fields, date fields, email…