Optingun - Optingun helps online businesses to create forms to convert website visitors into subscribers using action driven popups and social optins.
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!
Novocall - Novocall converts web visitors into sales calls in seconds.
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.
BetterContactForm - BetterContactForm provides a solution to companies for building contact forms on the web or mobile site.
Google Forms - Simple web forms from Google.