And here it is:
https://github.com/elafargue/onyxviewer
Check it out, do a "npm install" then "node server.js". You should then connect to localhost:8080 using a browser (tested on Chrome, Firefox should work, no idea about IE), go to "Settings" and input the name of the serial port. Go back to the main screen, click on "Connect", and as soon as it turns green, you can then either run diags (time sync, display test), or display the logs (see screenshot).
Let me know if this is useful to you, and what you would like to see!
Ed
PS: and looking at the screenshot below, can you tell where I was when I was working on this software ?