I have stumbled upon this via the puppylinux forum. It is different to LibreCAD's own appimage in that it works with a wide variety of linuxes, also older ones. For me it works even with puppy Buster and Xenial. It is a bit larger though.
I'm not sure what is the right place to post, but if it is of interest for someone:
https://github.com/pkgforge-dev/LibreCAD-AppImage/releases/download/2.2.1.3-2%402026-01-22_1769070645/LibreCAD-2.2.1.3-2-anylinux-x86_64.AppImage
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