Airtable
Budibase | Build internal tools on your own infrastructure
Crowdsignal | Surveys, Polls, and Quizzes | Get the responses you need, anywhere
Dropbox Forms: Receive files from your web site to your dropbox!
Email address classification and validation for disposable and free domain names : Identibyte
Form Tools
Forms Done Awesomely | Typeform
JotForm Easiest Form Builder
Jotform PDF Editor Product
OhMyForm | OhMyForm is the best open source form solution for the web
Open-Source Serverless CMS and Serverless Application Framework | Webiny
Tally forms
Upscribe - Embeddable Newsletter Signup Forms
Wufoo Online Form Builder
Yakforms