JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
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There are a couple of ways on how you can manage and analyze the data in your forms.
First option, you can check out the different kinds of reports that you can create from JotForm, here's a guide for that: https://www.jotform.com/help/326-How-To-Create-Form-Reports-in-JotForm. I believe what you are looking for is the Visual Report Builder.
Here's a specific guide to learn more about the Visual Report Builder: http://www.jotform.com/help/187-How-to-Create-a-Visual-Report-with-your-Form-Submissions
Aside from that, there are different app integrations that might help you manager or visualize your data. You can find them on this page: https://apps.jotform.com/
The famous one we have is the Google Spreadsheet integration: https://apps.jotform.com/app/google_spreadsheets_integration. This allows you to have an online spreadsheet, that application can also allow you to manage and analyze your submission data using graphs or charts. Here's an article about that: https://support.google.com/docs/answer/190718?hl=en
I hope that helps.