Open Board Viewer 
Linux SDL/ImGui edition software for viewing .brd files, intended as a drop-in replacement for the "Test_Link" software and "Landrex".
Features
- Annotations (per board database file)
- Part and pin sizes better represented
- Better outlining of irregular objects (such as connectors)
- Drag and drop
- Recently used file history
- Non-orthagonally orientated caps/resistors/diodes now drawn more realistically
- Adjustable DPI (for working on 2K/4K screens)
- Works with multiple concurrent instances
TODO
- Decode more board formats
- Compound project/file format
Prerequisites
Ubuntu
For Ubuntu developers, you'll need the following packages at a minimum;
$ apt-get install git build-essential cmake libsdl2-dev libgtk-3-dev
Fedora
For Fedora, you will need the following packages at a minimum;
$ dnf groupinstall "Development Tools"
$ dnf install SDL2-devel gtk3-devel fontconfig-devel
Installation
-
Clone the project
$ git clone --recursive 'https://github.com/OpenBoardView/OpenBoardView'
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Build it
$ ./build.sh
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Run it!
$ ./bin/openboardview ...or... $ ./openboardview.sh
Usage
-
Ctrl-O: Open file select dialog
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w/a/s/d: pan viewport over board
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x: Reset zoom and center
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Mouse scroll, -/=: Zoom out/in
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Mouse click-hold-drag, Numeric pad up/down/left/right: pan viewport over board
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Numeric pad +/-: zoom board
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Numeric pad 5: Reset zoom and center
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Space, Middle mouse click: Flip board
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R/./Numpad-Del: Rotate clockwise
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,/Numpad-Ins: Rotate counter-clockwise
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/, Ctrl-F: Search
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ESC: Clear search results and selected parts
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p: Toggle pin display
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m: Mirror board across Y-axis
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L: Show net list
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K: Show part list
Discussion
IRC Freenode channel: #openboardview