From Indies Services:
When customers want to gift something to their relatives or friends but they are not sure about their choice, at that time Magento Gift Certificate aids them a lot. By sending GC, receivers can purchase any product worth the amount of GC. This expands customer mass.
Admin can create multiple GC. Mail is sent to customers for sending Gift Certificate whose amount customers can check in their account. Customer can purchase more than one GC as well they can purchase it for themselves along with their friends. Simple yet elegant features of this extension allows your store to be in top position.