It is perfectly ok to sell open-source software: http://opensource.org/faq#selling http://opensource.org/faq#selling It seems his code isn't open-source, btw,

It is perfectly ok to sell open-source software: http://opensource.org/faq#selling http://opensource.org/faq#selling It seems his code isn't open-source, btw, but it's a nice thing he lets us see it for audit.