This software is still in the early beta phase but has been tested and seems to be working fine now, particularly the win-bk393 GUI version.
A linux version of this software would be very easy to make, the only change would be the serial port related code (setup and data acquisition).
win-bk393.exe - GUI windowed application
If you want to build this software on Windows, you'll require MinGW https://sourceforge.net/projects/mingw-w64/
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Build win-bk393 or bk393 ( Linux mingw64 install required, or mingw64 for Windows)
make win-bk393
An example of compiling on Windows using mingw-w64 would be:
mingw32-make -f Makefile.win win-bk393
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Run from the command line
win-bk393.exe -p 4 -m
The program will display in text the current meter display and also generate a text file called "bk393.txt" which can be read in to programs like OpenBroadcaster so you can have a live on-screen-display of the multimeter.
win-bk393 [-p <comport#>] [-s <serial port config>] [-m] [-fn <fontname>] [-fc <#rrggbb>] [-fw <weight>] [-bc <#rrggbb>] [-wx <width>] [-wy <height>] [-d] [-q]
-h: This help
-p <comport>: Set the com port for the meter, eg: -p 2
-s <[9600|4800|2400|1200]:[7|8][o|e|n][1|2]>, eg: -s 2400:7o1
-m: show multimeter mode (second line of text)
-z: Font size (default 72, max 256pt)
-fn <font name>: Font name (default 'Andale')
-fc <#rrggbb>: Font colour
-bc <#rrggbb>: Background colour
-fw <weight>: Font weight, typically 100-to-900 range
-wx <width>: Force Window width (normally calculated based on font size)
-wy <height>: Force Window height
-d: debug enabled
-q: quiet output
-v: show version
Defaults: -s 2400:7o1 -z 72 -fc #10ff10 -bc #000000 -fw 600 -fn Andale
example: win-bk393.exe -z 120 -p 4 -m -fc #ff1010 -bc #000000 -fw 600