If you have a site that sells downloadable files, LinkLocker is for YOU! This free version of the LinkLocker module allows you to provide download links for your files to your users without them ever knowing the actual location of the file. For example, if a user has purchased an item, you could include this tag between the weblog:entries tag set and pass it the url of the item that they've purchased. Additionally, there are many configurable parameters. For example, you  can configure each generated link to expire after a certain amount of time. Links may be locked so that they can only be downloaded from the IP address of the person who was shown the link. 

If you require more advanced features, such as click tracking and reporting, the ability to restrict links to logged in members (or specific member groups), deny hotlinking, or set the maximum number of downloads a link will allow, LinkLocker Pro for EE 1.6.x is available for purchase.