People (like for example Joerg Schilling) have re-licensed their work in the past not to be under the GPL any more: https://en.wikipedia.org/wiki/Cdrtools#Lice

People (like for example Joerg Schilling) have re-licensed their work in the past not to be under the GPL any more: https://en.wikipedia.org/wiki/Cdrtools#License_compatibility_controversy https://en.wikipedia.org/wiki/Cdrtools#License_compatibility... From the article, but this is also common knowledge: As is common with the GPL and other open source licenses, very little case law exists to provide guidance to users and provide a definitive answer on whether binary versions are distributable. And further: Joerg Schilling continues to develop his version of cdrtools under the CDDL and GPL (mkisofs) licenses, whereas the cdrkit fork has received next to no updates since. Good for him.