Create free online surveys.
I have used Survey Monkey with the English department @VBHS to get feedback about the summer reading requirements. Results allowed the department to make decisions about what assignments and books would be part of this requirement.
The district has also used Survey Monkey to research professional development opportunities you'd like to see offered.
Survey Monkey can also be used with students to get an idea of what they know and/or what choices they might like to have in an assignment.
Results are presented graphically which is a great use for a Statistics class or to use when teaching percentages.
I know Concetta Hall (8th Grade History Teacher at SGMS) uses Survey Monkey each month for our "Citizens of the Month." This makes it super easy for her to compile the results and determine the winner.
I used SurveyMonkey to get feedback about our sustained silent reading program from the entire upper school student body at St. Ed's. It really helped us understand the effect (or lack thereof) that the program was having on students' reading habits. We emailed the survey link to the students, and they completed it during homeroom at the prompting of their teacher. Very easy to set up and, I agree, extremely easy to compile the results!