StarUML (the successor of an object oriented modelling software called Plastic) is a free and open-source UML (Unified Modeling Language) and SML (Systems Modeling Language) modeling tool for Windows, Mac and Linux platforms, developed by MKLabs from Korea, using Java. It allows users to draw various UML/SML diagrams (such as class diagrams, use case diagrams, class diagrams, sequence diagrams, state diagrams, activity diagrams, communication diagrams, module diagrams, deployment diagrams, composite structure diagrams, etc.).

Visual Paradigm is a powerful, cross-platform, convenient and intuitive UML modeling and CASE tool from Hong Kong in China. It was converged by Visual Paradigm for UML (VP-UML for short), Agilian and Logizian these three products in 2014, with multiple editions for Windows, Mac and Linux platforms. This one-stop software solution is far superior to the conventional Model-Code-Deploy development process.