Wiring and electrical diagram drawing software

anyone point me in the direction of an open source or free to use electrical wiring drawing program?

looking to layout the wiring for my rover and boat so I can send the design to a friend and he can replicate it.

at the moment I’m using lucidchard which has the benefit of me being able to drop images in there of the pixhawk etc… but I keep hitting its max item limit before I get finished.

thanks
Oli

Try kicad: