*[https://openboardview.org/ OpenBoardView] - is a Open Source Linux SDL/ImGui edition software for viewing .brd files, intended as a drop-in replacement for the "Test_Link" software and "Landrex".
*[https://www.cadence.com/ko_KR/home/tools/allegro-downloads-start.html Allegro®/OrCAD® FREE Physical Viewer] - is a free download that allows you to view and plot databases from Allegro PCB Editor, OrCAD PCB Editor, Allegro Package Designer, and Allegro PCB SI technology.
*[http://boardviewer.net/ BoardViewer] - BoardViewer is software intended for viewing various boardview file types