OT-pdf File Editor

[Fred Herman <fherman inferential com>]

I've been looking for a utility that can take a non-form pdf file and
convert it to either a form or at least allow me to add text to the
file.  I have a bunch of forms made available on a government web site
for download and would like to fill them out without the need to print
them and type on the paper.  

Since I will be using the forms on a continual basis, it's worth my time
to try to convert them to forms.  Are there any open source utilities
that I could use for this?

TIA

Fred