Software Developed Under GPL

[David P. Engvall]

kclug <<

A friend of mind is a Windows software developer.  He tells me that he isn't interested
in developing
anything using Open Source tools because anything he develops will also be open source
and he
wouldn't be able to sell it.  I think there is a way to use Open Source tools and not
necessarily be required
to release the source for the resulting software.  Can you give some advice that I can
pass along to him and/or
refer me to links that discuss this subject.

Thank you in advance.

Dave