I've emailed the guy from xgps application and he said, he has done it using C and Openmotif toolkit

the first thing is OpenMotif free?

I have looked at this Debian page and at the end said non-free, does it mean its not free package?

Is there something similar but free?

I've just wanted to build on the xgps application because I the beginning I want to do the same.

I would have kept asking to the guy but the told me to bugger off no nice

Thank you for you help here!

In the open source world the expressions "free" and "non free" refer to copyright restrictions. Free software may be modified and used by anyone as part of their own work. Non free software may not be legally modified nor incorporated into another person's project without the express written consent of the copyright holder.

I searched your previous posts. I see that you have an Nvidia graphics card. Nvidia makes a Linux driver for their graphics card that they will give to you at no cost but it is not "free". That is to say that the Nvidia driver has restrictions on its use stemming from the copyright on the drivers.

So that's what is meant by free and non free in Linux and in the open source world.

thanks for your comment here , very well explained!

Yes I've left the thread for future reference but I have sort the Nvidia issue, as the guy suggest lenny works straight away Thanks

I was only using the Nvidia driver as an example of a non free product that doesn't cost any money.