Forms in Google Docs as free online survey tool

Interesting features like pre-populated form fields & logic branching can be utilized to create professional online surveys using Google Forms.

With Google Docs, you can pre-populate form fields via URL parameters. This is pretty handy in case you want to pre-fill some fields of the form with default choices or if you are planning to integrated a Google Docs form with another system like the comment section of your site – if someone has filled their name and email in the comment section, they need not fill that data again in Google Docs form.

Google Docs is probably the only free polling software that supports logic branching. This is like serving a different set of questions to a user based on their previous responses.