SurveyMonkey provides free, customizable surveys as well as a suite of paid back end programs that include data analysis, sample selection, bias elimination, and data representation tools.  Basic features are available at no cost, while more advanced features are available through tiered pricing plans.

Google Forms

Google Forms LogoGoogle forms is a tool that collects information from users via a personalized survey or quiz. The information is automatically connected to a spreadsheet with the same name. The spreadsheet is populated with the survey and quiz responses.