LibreCAD is a fork of the community edition of QCAD. It differs slightly in look and feel, but is generally a few versions behind QCAD, and may have a few bugs of it's own. It's free as in beer and in speech. Nothing to lose by trying it apart from time.
How suitable it is depends on what you need! It's a fully competent 2D-CAD package reminiscent of Autosketch, and mostly complete – not needing much in the way of new gismos. It supports conventional 2D Technical Drawing rather than PCB layouts, gcode, etc. Like Autosketch (no longer available), it takes a simpler approach to 2D-CAD than AutoCAD, which is so feature rich that it's hard to learn. It's powerful enough for all my 2D-CAD requirements.
QCAD is a strong alternative to LibreCAD – the two are very similar. The community edition is also free.
I found it worth paying for QCAD-Pro, which is the same software plus several useful features. One of them is a tool for removing segments, which is a few clicks faster than LibreCAD, and it adds up. Otherwise, Pro supports more CAD file formats, can do simple isometric projections, faster bug fixes, and is generally worth having if the program is used often. The Pro licence is quite permissive, allowing the user to have several installations on Windows, Apple, and Linux.
There's a companion CAM package, but I've never used it.
I'm very happy with QCAD – it was my preferred 2D-CAD software before I owned a lathe! But it is what it is, a good 2D Technical Drawing package.
Dave