Proceedings of the European Workshop on Software Ecosystems 2012 The research on software ecosystems still is a young and emerging field. We created the European Workshop on Software Ecosystems to: - bring together the research community from all over Europe and - share, present and discuss their latest research with business experts from the software industry A big thank you to the many people who supported this workshop and the proceedings. Researchers and Presenters: - Josef Waltl / Technical University of Munich, Germany What makes a software platform attractive for ecosystem partners? - Karthik Jayaraman / University of Oslo / Norway Managing the Arbitrage of Control and Generativity in Software Ecosystems - M. Schreiner, T. Hess / Ludwig Maximilian University Munich, Germany The Success of Software Companies Internationalization: The Case of Germany - K.-B. Schultis, C. Elsner, Siemens AG, D. Lohmann / FAU University of Erlangen-Nuremberg, Germany Architectural guidance and governance in industrial software ecosystems - S. Hyrynsalmi, A. Suominen, T. Mäkilä & A. Järvi / University of Turku, Finland Analyzing Developers Challenges in Mobile Application Marketplaces - J. Wollersheim, A. Teufl, P. Hoberg, P. Wolf, fortiss GmbH, H. Krcmar, Technical University of Munich, Germany Mechanisms to gather customer feedback - Requirements in the cloud service ecosystem Industry Sponsors: BlackDuck Software, Corum M&A, fluid Operations, InnoWerft, Netfira, Partner-Port, Suse Software, Synomic. WWW.EWSECO.ORG