If you want to add some custom attributes to your cart page, let customers fill out more information about the order.
Or you want to collect more information about customer, add some custom attributes on customer registration page.
Here is an great App for you to do that.
Customized Attribute app helps you to collect additional information on the cart page and customer account registration page, account page. With this app you can get the necessary data directly from your customers in an easy way. And you can see them in the store admin pages. Place fields on registration page to know age, preferences and interests and all other information you may need. Or place fields on cart page to know delivery date, logo text and so on. You can let customers select from available options, type their own text, leave comments, etc. So many type of attributes meets different usage requirements.