Free alternative to TeamViewer: UltraViewer

Hello,
I would like to report this free alternative to TeamViewer. It is a basic remote desktop, doesn't have all TV features, but for remote support I think this is a valid software (it has a chat and file transfer embedded into the chat windows).
To automate the connection with remote, it is necessary to launch the program with a batch file. The sintax is:
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REM Open Main program window

start "" "C:\Program Files (x86)\UltraViewer\UltraViewer_Desktop.exe"
REM wait 10 seconds

timeout /T 10
REM launch the connection to remote

start "" "C:\Program Files (x86)\UltraViewer\UltraViewer_Desktop.exe" -i:REMOTE-ID -p:PASSWORD

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if you want to evaluate the possibility of integrating with RDM, following the link to website.

https://ultraviewer.net/en/

Thank you
Best regards,
Davide