* The SurveyMonkey Template Gallery: SurveyMonkey is another popular survey software provider, and their template gallery also offers a variety of sample questionnaires that you can customize to fit your needs.
* Google Forms: Google Forms is a free, easy-to-use tool for creating surveys. Google Forms includes a number of templates that you can use to get started, including a variety of sample questionnaires.
* The American Association for Public Opinion Research (AAPOR): The AAPOR is a professional organization for public opinion researchers. The AAPOR website contains a number of resources for survey researchers, including a collection of sample questionnaires.
* The Social Sciences Data Center at the University of California, Berkeley: The Social Sciences Data Center at Berkeley hosts a collection of survey data that includes a number of sample questionnaires.
* The Inter-university Consortium for Political and Social Research (ICPSR): The ICPSR is a consortium of universities that provides access to a wide range of social science data. The ICPSR website includes a number of sample questionnaires that you can download and use.