We want integrate Netgen Mesh Generator into our own closed-source software, which we plan to distribute (commercially or not).
Can we use the Netgen Mesh Generator for free?

Yes, you can use Netgen in your commercial closed source software based on the LGPL license.

You have to tell your customers that you are using Netgen.

If you prefer a different license you can talk to the author,

best, Joachim