DigiShop is a component for Joomla 3 sites which offer free and paid file downloads. The component is quite straightforward and easy to setup and use.
Originally it was created for internal use - it is running on this site, serving downloads, e.g. Smart Countdown 3 animation profiles.
DigiShop is not a ECommerce application. If you need a powerful online store on your site DigiShop is not for you. The advantage of DigiShop is that you can start selling files in minutes, no need for complex shop setup and configuration and no learning at all.