I am happy with Google Forms but I need to include questions that allow including a table where the respondent can fill.
Are there any free substitutes out there?
try http://www.surveymonkey.com for free survey and online questionnaire creations. Major companies use its service.
For more tech tips visit http://www.factsnfakes.in
I was going to suggest SurveyMonkey myself, but Gaston specifically asked for non-freemium sites...