I need to create PDFs dynamically. Basically a PDF template is provided which is kind of a form. Based on the data filled by the User, the form should be populated. The template will reside in Document library of Salesforce or Intranet. Is there a way to do it?

There are tools which allow PDF creation on fly like iText. But they are based on .Net or Java or Com/ActiveX platform. Can this be done within Salesforce.

I have already considered the option of generating the pdf using Visualforce. But it doesnt seems feasible because of huge number of different forms with each form consisting of more than 20 pages.