LibreCAD Alternatives for Linux

FreeCAD is a highly customizable, scriptable and extensible computer aided design software software for the, MacOS, Linux and Windows operating systems. With FreeCad you can model and design real-life objects in 3D through parametric modeling where all 3D objects you design are controlled by parameters. FreeCAD is released as free and open source software under LGPv2+ license, and can be used for commercial and hobby projects alike.

KiCad is a free and open-source, cross-platform software suite for electronic design automation. With KiCad it's easy to make professional PCB layouts with up to 32 copper layers. The schematic editor provided by KiCad allows you to create your own design without limits and then inspect and view your work in the 3D viewer through an interactive canvas.

A free 3D CAD software developed for macOS, Linux and Windows. With OpenSCAD you can create solid 3D CAD objects through a script-only based modeller that uses its own description language. All objects in OpenSCAD can be viewed and inspected but not interactively selected or modified with gestures or mouse. Everything in OpenSCAD is based on scripts, a feature that some love. The software is openly developed and released under the GNU General Public License.

BricsCAD is a commercial CAD software for 2D and 3D modeling supporting industry-specific apps.