GetResponse
GetResponse is an email marketing automation platform that helps build email lists, autoresponders, and email analytics. With GetResponse, you can bring your business online and grow your customer base. It is also possible to increase online sales by interacting with customers.
forms.app integrates with GetResponse so you can create new leads and update them instantly. Thus, you can create a customized routine for your business and closely monitor your e-mail campaigns.
You might also like

Help Scout
Easily answer support emails.Zapier

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

Trello
Create or update cards, boards, and do many other cool things with this Trello integration.Zapier

Craft
Streamline product management progress.Zapier