LeoCAD
Virtual brick CAD software
LeoCAD is a CAD program for creating virtual LEGO models. It's available for free under the GNU Public License v2 and works on the Windows, Linux and macOS Operating Systems.
LeoCAD is a CAD program for creating virtual LEGO models. . It has an easy to use interface and currently features thousands of different pieces created by the LDraw community when installed with the ldraw-parts package.
How to install LeoCAD in Ubuntu
If you are on a supported distro, you can install the application through software center by clicking the below link.
If the above link not working, run the below command in terminal to install leocad in Ubuntu
sudo apt install leocad