FeedbackSpark's answer:
Range of powerful features designed specifically for digital product teams:
Customer Feedback Portal - Ask customers what you should build next
Back Market - the refurbished (super) market
Feedback Tools - Curated directory of tools for getting all the feedback
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.
Feedback Fish - Collect feedback & make your customers happy.
Love & Robots - Create your own 3D printed jewelry & accessories online