DropBox
Dropbox is a cloud storage service that enables you to do everyday work more efficiently such as file storage & synchronization, personal cloud storage, and many other things. With dropbox, you can store small or large files securely and access them whenever you want.
With forms.app being integrated with Dropbox, you can automate many processes such as creating new folders, uploading files that you received through your forms, and many other useful things.
You might also like

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

Google Tag Manager
Google Tag Manager is a tool that allows users to add tags to websites without changing the existing codes.
PayPal
Collect fast and secure payments through your forms.Native

Harvest
Simplify your work routine.Zapier