Desing software

Hi,

Sorry for broken english.

I wanted to know what program do you use for making mecanism and ect. For circuitry I use fritzing and sometime for mecanism I use algodoo but what are the othdr option. Open source if possible

Thank you and have a great day

Mostly I use pencil and paper. I also use Libre Office Draw and have just started using OpenScad (which are both free).

...R

Circuits, PCB design: KiCAD. CAD drawing: FreeCAD.

LTSpice