Question: I'm looking for a solution to create customizable forms for event registration and payment processing.

Tripetto is a full-featured form builder that brings the best of SurveyMonkey, Typeform and Landbot to the table. You can build a variety of forms, including registration forms, with features like a Magnetic Storyboard, Form Faces for styling, Conversational Logic, Data Storage Autonomy and Automations. That makes it a good option for building conversational forms with lots of customizability even if you're not a programmer.

Another option is Duonut, a no-code workflow automation tool that's geared specifically for building custom forms and workflows. It can handle event registration and payment processing with smart forms that can change based on earlier answers or other data. Duonut features include form templates, answer piping, advanced logic and API integration, so it can handle a lot of business needs with a minimal amount of programming.

If you want something more AI-powered, Formless is an interactive form builder that works with more than 120 languages. It integrates with tools like Hubspot and Mailchimp so you can automate processes and keep people engaged. Formless is good for events where you have to handle registration and engagement in multiple languages.

Last, Upflowy is a drag-and-drop tool to build optimized forms, quizzes and surveys. With features like conditional logic, custom fields and analytics, it's designed to increase conversions and simplify customer interactions. Upflowy integrates with more than 1000 tools and platforms, so it's a good option for event registration and payment processing.