Which fields or careers are most welcoming to former teachers or teachers seeking to transition out of teaching?

It depends.

What is your degree in? You area of expertise? Math, Business, Science, English, History?

I have a degree in French, but have been teaching 1-3 grade for the past 8 years. I have intermediate computer skills... worked as a test engineer 5 years ago, but feel I'm too old to return to the field and too rusty. I took a break from teaching after four years. Worked in the computer field for a year and returned to teaching.

Perhaps going back into the computer field would be one possibility.