Magento

Hi,everyone. I’m a college student. I’m preparing to sell some apps with magento. I’m a newbie. I’ve searched a lot. But I can’t find a good extention. So, I need your help.
The main functions needed:
When the customers purchased the app then the license key and download link will be sent to the customers via email.
The license keys can be added as CSV or txt files. One product can be added multi keys. One purchase finished, send one key automaticly to the customer.

Hope get you guys reply. Thank you very much.

Hi alechsueh,

Here you may find the description of the common products types used in Magento. It seems that you have to pay most of your attention to the Downloadable product type. In that particular case you may also find these next two articles interesting:
Creating a Downloadable Product #1;
Creating a Downloadable Product #2.

Or this one:

www.magentocommerce.com/magento-connect/serial-codes-5907.html‎

Yes you can sell the digital product attaching a license key by this module Product License

Thanks