You don't need any CAD experience to get started with QCAD immediately. QCAD is an easy to use but powerful 2D CAD system for everyone. But what people notice most often about QCAD is its intuitive user interface. QCAD was designed with modularity, extensibility and portability in mind. The source code of QCAD is released under the GPL version 3 (GPLv3), a popular Open Source license. With QCAD you can create technical drawings such as plans for buildings, interiors, mechanical parts or schematics and diagrams. And a brief history in tweets reminisces about the days of old.QCAD is a free, open source application for computer aided drafting (CAD) in two dimensions (2D). UMLet supports a variety of UML diagram types: class diagrams, use case diagrams, sequence diagrams, state diagrams, deployment diagrams, activity diagrams - see some examples.įinally, porting UMLet to a JavaScript web app, and later to a VS Code extension, is described These custom elements are outlined here or in this paper. Without leaving UMLet, users can thus create and add new element types to their diagrams.

An element's look can be modified at run-time by changing a few lines of Java code UMLet then compiles the new element's code on the fly. UMLet also allows users to create their own custom UML elements. Elements can also be modified inside their palettes and immediately used as new templates this way, users can easily tailor UMLet to their modeling needs. Learning about the various element features is supported by prototypically using them from sample palettes. UML elements are modified using text input and a small markdown dialect instead of pop-up dialogs. UMLet is a UML tool aimed at providing a fast way of creating UML sketches.

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