Guru
Guru is the knowledge management solution where your teammates can be organized from a single channel for your entire workflow. Your employees can access all the information they need from anywhere at any time and communicate with each other.
When you integrate your forms.app and Guru accounts, you can add a user to your team, create a group, and add users to the group. You can also organize your workflow items by creating cards.
You might also like

Crowlingo
Use your form and survey responses as data sources and report them.Zapier

WordPress
Connect your form responses to your WordPress and register people to your website.Zapier

Smartsheet
Open worksheet, attach files and share via email.Zapier

Envoke
Start creating subscriptions for your mailing lists.Zapier