FRET - it has a name

I have seen it and it has a name! Actually, I haven´t seen it but I have mapped it out roughly on paper. Since ealy March, I´ve been investigating needs within the free software community with the idea in mind of starting development of a Unix tool. I've looked at tools such as hex editors and binary diff tools and think I''ve spotted a gap. There is no tool available that will use sheer computing muscle to analyse black-box files and describe their internal structure - this could potentially save man-months if not man-years of development time - now I need to decide if there is a real need.