Open BoardViewer BoardViewer 2.0.1.8 its a open boardviewer software it support many file extension, like
*.asc
*.bdv
*.brd
*.bv
*.cad
*.cst
*.gr
*.f2b
*.faz
*.fz
*.tvw
*.asc
*.bdv
*.brd
*.bv
*.cad
*.cst
*.gr
*.f2b
*.faz
*.fz
*.tvw