I just came across this program the other day. Can't say much about it as I only used it for about 3 minutes, but bookmarked it.
Plan 12V electrical systems for boats and campervans. Lay out components, route cables, and get cable & fuse sizing.
crimp.studio
Some folks are using MicroSoft Visio to draw circuits. I picked up a copy for about $10 from StackSocial.com
The drawing features in MS Word also work. Takes a bit to get the hang of it, but works for basic drawings.