Electric Circuit Diagram Software ?

[randygva]

In the process of delving into the electrical systems on our 1981 Bristol 41.1. Needless to say opening the panel behind which is a rats nest of wiring as it's apparent some new wiring / circuits have been added with many of the older wiring cut off but not removed.

Is anyone aware of an IPad / IPhone app (ok pc too) software that will help me to generate a new wiring diagram as I begin to run all the circuits to ground

I can use PowerPoint and generate my own, but I was hoping for something smarter that might generate readable wire runs as I continue to add new circuits.

Thanks in advance.