Formly - Collect data Anytime, Anywhere, even offline.
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!
Jotform - Free Online Form Builder & Form Creator
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.
FieldGoal - Don't build a whole backend just for one stupid form.
Botsify Conversational Forms - Lead generation forms for chatbots