Yavar,

You asked:

I need a free sch and firmware of a AT89c51

Some people suggested you good links to free programmers

Your conclusion:

but these programmers are not perfect and they are very simple than are suitable for professional users.

If you really need a professional quality programmer, you will have to spend money.

I suspect him to be a fool who will give you schematics and sofware of a professional quality device programmer for Free

IA