This Module Allow To enter Custom Note In Website.
Please go to link to see functionality of this module: Click To View
-> This Module allow to add custom notes in website by customer
-> There is a field in product as shown in image which allow to show note field in product description page.
-> once we allow the note button in product and any visitor go to product description page they can add custom notes as per shown in image
whatever the note is entered in website will take reflect on backend sale order and display it