Crmble
Crmble is a customer relationship management system built in Trello. With Crmble, you can reach more potential customers, prepare reports about your sales and keep all contact information in a single source.
With forms.app and Crmble integration, you can organize your workflow and store important information by creating a Crmble card in Trello.
You might also like

iContact
Streamline new contacts to your emailing list from your form responses and automate your work.Zapier

Zenler
Register users for live webinars and classes.Zapier

Supademo
You can add your forms to your demo as a step and automatically generate leads and sales.
Sprout
Create a customer or product profile for your website.Zapier