Visual Paradigm Community Edition is a FREE CASE tool for you to create professional-look diagrams in Unified Modeling Language (UML). It is a strip down version of the full Visual Paradigm package. The Community Edition is a good starting point for learning how to UML diagrams. As you get familiar with the software you may interested in other advanced features from the full Visual Paradigm package. Instead of reinstall the software with the evaluation version to try out those features, you can simply turn your Community Edition into evaluation version of the full Visual Paradigm in few clicks.