ACProtect standard 

ACProtect is an application that allows you to protect Windows executable files(PE files) against piracy. Using public keys encryption algorithms (RSA) to create and verify the registration keys and unlock some RSA key locked code.
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SDProtector Pro 

SDProtector is a powerful tool offering both software developers and distributors a protection of software products against unauthorized copying, use and distribution.With SDProtector,it's easy to turn your application in "try-before-you-buy" version
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