Dudle - Dudle is an online scheduling application, which is free and open source.
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.
Google Forms - Simple web forms from Google.
Framadate - Make your polls
Qualtrics Research Core - Qualtrics is the most trusted research platform, helping brands make crucial business decisions. From surveys to insights to action.