Magento customer attributes extension by FME enables you to add multiple types of unlimited custom attributes to the registration & account pages. Restrict custom attributes to specific customer groups, set their position, hide custom fields and make them optional or mandatory. 

This extension supports following type of customer attributes:

 - File upload
 - Image upload
 - Text Field
 - Text Area
 - Date
 - Message Only
 - Drop Down
 - Multiple Select
 - Yes/No
 - Radio and check box fields

This extension supports the following input validations.

 - Decimal Number
 - Integer Number
 - Email Address
 - Website URL Address
 - Letters Only
 - Letters and/or numbers
 - Date

More Info: Magento Customer Attributes