Beta Family - 50,000 testers to test your app
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.
Betatesters.io - The platform connecting mobile developers and beta testers
SurveyJS - Feature rich and open source surveys for embedding into websites.
Passmarked - Simple, all-in-one test to check the quality of your website
Votee - Easy, reliable, and cost effective market research