[Gta04-owner] GTA04-Custom: EAGLE schematics and board file blueprint for developing expansion/adapter boards

[Timo Juhani Lindfors]

"Dr. H. Nikolaus Schaller" <hns at goldelico.com> writes:
> There is a free (as in free beer) version of EAGLE with minor limitations.
> And any major CAD tool can import it.

At least two years ago when I was trying to find software that can open
EAGLE files for Arduino boards I could not find any free software to do
that. Maybe all the major CAD tools are non-free?