SurveyMonkey
Used by 2 peoplesurveymonkey.com ↗

“SurveyMonkey is great for getting real-time feedback from Library staff and patrons, and I really love the filtering options in the admin.”
Morgan Holzer Interview, Information architect (NYPL) · via Uses This 
“We use SurveyMonkey to run surveys.”
Karina van Schaardenburg Interview, User experience researcher (Twitter) · via Uses This