Nmap is very good. It's an open-source solution. Commerically, only the support service is available. 

Nmap is an open-source product. You don't need a license to install it.

It's just a free tool. You download it from the web and use it. I don't think it's licensed for direct support.

I am using the standard free version of Nmap.

The solution is free of cost, but there are specific services that we have to buy. We have purchased a license for a professional version. It's open source at some level, but not for all features.

Nmap is open source software, which suits us well because we are a manufacturing company and not an IT company, for example. If we were an IT company, we would probably need to pay for extra support or instead go for another software solution. But as it is, we don't have any need for high-end troubleshooting tools.

Nmap is an open-source and free product. 

It is a free source application.

The solution is open source so it is free. 

Nmap is an open-source solution.

It's free.

Nmap is free and should stay this way.

In this economy, employees who can save their employers money are highly regarded and will potentially be in line for advancement. Using open source technology is one great way to help your company cut down on costs across the board.