Contact Form 7 - Contact Form 7 is a tool to manage multiple contact forms.
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!
MightyForms - Powerful forms with lead generation and workflow automation
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.
Forminator - The unbelievable free form plugin you have been looking for
Google Forms - Simple web forms from Google.