http://safengine.com/en-us

إقتباس :

Safengine provides you with a powerfull built-in software licensing system, with which you can give your application a reliable licensing module with zero code modification. Allowing full control over your application, you can apply trial limitations such as execution time regulation, execution count, date expiration and hardware ID binding. Safengine uses strong cryptographic algorithms to make the licensing functions very secure. Without a valid license file from you, it takes years to brute force the internal decryption key for your application, thus rendering any attempts useless.