1. 10 years ago, Franklin was selling Keil C51 compiler under his own name. They were just selling the compiler, they had no own development.

2. Few years ago, they have stoped the cooperation, so I think You'd better buy a Keil C51 compiler. 10 years old Franklin C51 compiler has in fact a Keil technology inside. I think that you'll have no problems when using new Keil C51 compiler.

Franc