LeoCAD is a CAD program for creating virtual LEGO models. It has an easy to use interface and currently includes over 6000 different pieces created by the LDraw community.
SimScale offers a software that allows you to perform CFD, FEA, and Thermal simulations to your CAD model in the cloud without needing high-performance computing power.
The UCCNC is a machine control software. It uses and external hardware to generate signals to
Open Cascade CAD Assistant is a powerful offline 3D CAD viewer and converter with simple and intuitive interface, free for both personal and commercial use.
Now even better: FluidDraw stands for fast and easy standardised documentation of your machines or systems. With the new FluidDraw P6, you can create pneumatic and electric circuit diagrams even more reliably and efficiently.