Introduction: Two major trends in the area of information systems development are (1) the growing interest in Workflow and Business Process Management (BPM) systems and (2) the increasing acceptance and use of open source software. This development raises the following questions: 1. What are the prominent representatives of current open source Workflow and BPM systems? 2. What is the maturity level of these systems? Seeking answers to these questions, we have performed a study into the maturity of open source BPM systems. First, an overview of the existing open source systems was made, and three systems – jBPM, OpenWFE, and Enhydra Shark – were selected for further analysis. Then a detailed analysis of the selected systems was performed. The results from this analysis were documented, and the developers were invited to comment. Based on the feedback from the developers, the results were revisited and the study finalized . In this article, we summarize the study and reflect on the area of open source BPM systems
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