Catalog.CodeProject.com

A licensing utility that facilitates user to integrate licensing feature in the application.
The main feature has the ability of automatically expiration of serial key after a given period.
Secondly it creates a strong binding with the machine(that is the application will work only with the registered machine) on which the key is registered that is no one can move the application without the prior consent.
It also has a subscription based concept that is one can set the subscription period if requires and the product will asks for a new key after the specified subscription period.