Nokia is spreading fear, uncertainty and doubt about Free Software in the statement where they announce selling the proprietary Qt business to Digia Many organizations which want to use Qt for their business applications choose commercial licenses, for a variety of reasons. These include restrictions in using open source licensed software in industries such as defense & aerospace, or the need to provide product warranties & indemnities such as in the medical device industry. Others choose a commercial relationship for access to Qt professional support and services to ensure successful development of their projects.