LimeSurvey - LimeSurvey: the Online-Umfrage Tool - Open-Source Suryeys
Adobe Campaign - Adobe Campaign provides campaign, offer, and personalization management capabilities.
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!
HubSpot Marketing Hub - HubSpot is a cloud-based inbound marketing software that allows businesses to transform the way that they market online.
Google Forms - Simple web forms from Google.
SEMRush - All-in-one Marketing Toolkit for digital marketing professionals.