Ninja forms - Ninja Forms is a free form creation solution for WordPress.
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.
Typeform - Create beautiful, next-generation online forms with Typeform, the form & survey builder that makes asking questions easy & human on any device. Try it FREE!
Google Forms - Simple web forms from Google.
Qualtrics Core XM - From customer insights to market segmentation to concept testing, Qualtrics CoreXM is the single solution for all of your experience data.
AidaForm - AidaForm is a cloud-based service to create customizable web forms, landing pages, surveys, polls.