Product management, sales, marketing etc coupled maybe with some business school training. Sometimes these are better paths into management, because you get sufficient product knowledge to help you understand the nitty-gritty details of what you will be managing or becoming a executive for.

I know of two options if you are willing to work your way up slowly:

1. Become a domain expert and work in the domain and then move into product management. Kind of a round-about way to go about it, but if you like the domain then why not.

2. There are also a lot of low level project coordination jobs out there. It's not really management and it's really stressful work as you get a lot of responsibility, but not a lot of power. But if you don't burn out then you'll slowly get more and more clout and move up the hierarchy.

You know, a large proportion of companies don’t even have developers employed or much to do with software, yet they still have people in management. This implies that there are multiple ways!

Depending on the organization, roles in project management or analysis are non-developer routes to management.

Going back to school and getting an MBA seems to work for a lot of people.