1)   MaxtoCode Standard 3.21
Maxtocode is the most-secured .NET protection technology which utilizes a combination of deep obfuscation, strong encryption and a real-time technology that protects your software while it is being executed.

 2)   ElecKey 2.0
ElecKey is the complete solution for software copy protection, software license management, and secure electronic software distribution system. ElecKey provides software security that helps to protect your software applications against piracy.

 3)   .NET Encryption Library 1.09
Affordable, powerful, and easy to use .NET Encryption/Hashing/Compression Library. Encrypt sensitive information such as passwords, credit cards and social security numbers.