WoPeD (Workflow Petri Net Designer) is an open-source software developed at the Cooperative State University Karlsruhe under the GNU Lesser General Public License (LGPL). The main goal of this tool is to provide an easy-to-use software tool for modelling, simulating and analyzing workflow process and resource descriptions using workflow nets, an extended class of Petri nets initially introduced by Wil van der Aalst (TU Eindhoven). WoPeD is mainly indended to be used by researchers, teaching staff or students dealing with the application of Petri nets to the area of workflow or business process management. WoPeD has already been successfully used as modelling tool in lectures and student assessment projects. WoPeD is maintained via Sourceforge, a web-based, open source development platform. The current development progress can be followed on the WoPeD project homepage at Sourceforge.