Compared with QCad Community Edition, the changes in LibreCAD are: the latest Qt4-based user interface (QCad Community Edition uses QT3), plug-in system, automatic saving and better DXF file reading. Additionally, QCad Community Edition is officially only available for Linux (QCad itself is cross-platform, but not free), while LibreCAD is cross-platform and free.
It not only supports cross-platform operating systems such as Windows, Linux, and Mac, but also provides graphics extensions in formats such as DXF, JWW, and DWG. It can export graphics to SVG, TIF, BMP, XBM, XPM, PPM, JPG, and PNG. Pictures and most basic functions of 2D drawing are all available. The good thing is that there is also a free installation version of LibreCAD, which is really good.
At this version, LibreCAD is stable but still needs improvements, so don't expect comparisons with professional applications such as AutoCAD. Also, LibreCAD doesn't take out documentation - it originally included documentation from QCad, but it has been removed because it was not released under the GPL.
Additionally, the application does not support DWG files. There is some work on this, but it has not yet been implemented because of some licensing issues with LibreDWG.
LibreCADFunction introduction
System new capture
Isometric grid
trisecting an angle
Drawing engraved circles and ellipses
Draw the common tangent of two ovals
Better international support, including Chinese, Japanese and Korean fonts
Experimental offset support
better performance
Be careful to select Chinese when starting for the first time
it works
it works
it works