Easy Test Maker – is a free online test generator to help you create your tests. With Easy Test Maker you can create multiple-choice, fill-in-the-blank, matching, short answer and true and false questions all on the same test. You can also insert instructions and divide your test into multiple sections.
Zoomerang Surveys – this is the free version. You can have up to 30 questions per survey using multiple pages. You can create survey questions and answers in almost any language. Reporting on a maximum of 100 responses per survey and the survey data is only stored for ten days after your survey is posted. There is limited analysis capability.
DiscoverySchool.com – this quiz center is the most flexible and comprehensive quiz-making application on the Web and it’s free. All you have to do is join My discovery and set up a Custom Classroom.
http://school.discovery.com/quizcenter/quizcenter.html
Hot Potatoes – this site includes six applications, enabling you to create interactive multiple-choice, short-answer, jumbled-sentence, crossword, matching/ordering and gap-fill exercises for the World Wide Web. Hot Potatoes is not freeware, but it is free of charge for those working for publicly-funded non-profit-making educational institutions, who make their pages available on the web.
Quizlab.com – 30 day free trial
Free On-Line Surveys – with this account you can try out most of the features for 10 days (max 50 respondents per survey)
https//free-online-surveys.co.uk/welcome.asp
Quia.com – quizzes, surveys, create activities – 30 day free trial
4 Teachers – Checklists, RubiStar Quiz maker, RubiStar Rubric maker and other items. http://www.4teachers.org
Survey Monkey – Intelligent survey software for serious primates of all species. SurveyMonkey has a single purpose: to enable anyone to create professional online surveys quickly and easily.
This collection of survey resources and comments is from City University’s Masters in Teaching Program
Scott Le Duc 
Zoomerang is always my 1st choice; I have been using their free service for years. It has always been a dependable service for me and I have never had any issues at all, which is pleasantly surprising considering how often I use them. From what I remember seeing on their site they did offer discounts to educators, nonprofits, etc… but you would have to check on that.
any chance you could post a comparison of the free site only? I tried zoomerang and then http://www.cafesurvey.com which I thought was better. please compare site that doesnt cost money only.