Survey or questionnaire document class or package?

The Leibniz Institute for Social Sciences at the University of Duisburg, Essen, Germany developed the Questionnaire Development Documentation System (QDDS). Version III of this software includes two LaTeX styles that were created to implement paper based questionnaires:

• paperandpencil.sty for paper and pencil questionnaires, and
• papy.sty for paper assisted personal interviews.

The styles and some examples can be downloaded here.

The AcroTeX bundle provides the eqExamn package.

D.P. Story (the AcroTeX author) has published a PracTeX article on the subject of creating surveys using TeX Producing a TeX/LaTeX Online Survey with the eqExam Package

I would recommend having a look at SDAPS, since it provides a class to build questionnaires. But the greates feature of this software is the ability to do optical mark recognition on the questionnaire built with this class. All you have to do is scan them. Have a look at the project website http://sdaps.org/