Survey Monkey - Create and publish online surveys in minutes, and view results graphically and in real time. SurveyMonkey provides free online questionnaire and survey software.
Sourceful - A search engine for publicly-sourced Google docs
SurveyJS - Feature rich and open source surveys for embedding into websites.
SatisMeter + NomNom - Turn your SatisMeter NPS responses into product insights
Votee - Easy, reliable, and cost effective market research
CareKit by Apple - Open source software framework for creating health apps