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.
And Be Honest - Get anonymous feedback from friends
SurveyJS - Feature rich and open source surveys for embedding into websites.
Self Test by Ahead App - Receive anonymous & honest feedback on your social skills
Votee - Easy, reliable, and cost effective market research
Speedback - Anonymous peer feedback via Slack