Code Virtualizer is a software protection solution using heavy obfuscation. Citing the author’s website :
Code Virtualizer is a powerful code-obfuscation system that helps developers protect their sensitive code areas against Reverse Engineering while requiring minimum system resources.
Code Virtualizer can generate multiple types of virtual machines with a different instruction set for each one. This means that a specific block of Intel x86 instructions can be converted into different instruction set for each machine, preventing an attacker from recognizing any generated virtual opcode after the transformation from x86 instructions.
This post describes DeCV — a decompiler for Code Virtualizer.