In this section, we provide some case examples of companies with some relationship to open source software. This is in no way an endorsement of the business models of these companies, neither of their products. We just hope that these case examples may help the reader to better understand some of the business models related to open source software being used nowadays in Europe. However, keep in mind that most of the information in this section has been provided by the involved companies, and that they are not necessarily the most related to open source, neither the most successful in this respect.