PHP Command line tools, for common tasks Magento 1 does not provide easy acccess to.
If a customer create an account in Magento, previous orders does not get attached to his/her account. With this tool you can input website and customer email and previous order will get attached to the customer account. So the customer now can view his previous orders.
Magento does not provide an easy way of changing the email of an order. With this simple tool you just input the correct customer email and the order increment id, and the customer email is now changed.