Dudle - Dudle is an online scheduling application, which is free and open source.
Calendly - Say goodbye to phone and email tag for finding the perfect meeting time with Calendly. It's 100% free, super easy to use and you'll love our customer service.
Google Forms - Simple web forms from Google.
Framadate - Make your polls
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.