Apache OpenOffice Draw
Open SourceApache OpenOffice Draw is a powerful vector graphics editor within the OpenOffice suite. It's ideal for creating flowcharts, diagrams, technical drawings, and general vector illustrations with ease and precision.
Diagram Softwares and Apps
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LibreOffice - Draw
Open SourceLibreOffice Draw is a versatile vector graphics editor and diagramming tool included in the LibreOffice suite. It offers powerful tools for creating flowcharts, technical drawings, posters, brochures, and editing PDF files.
ThinkComposer
Open SourceThinkComposer is a highly flexible visual modeling tool designed for users to create rich, structured diagrams based on their specific domain knowledge. It facilitates the organization and visualization of complex information through various diagram types and hierarchical structures, enabling deep understanding and effective communication of ideas.
PlantUML
Open SourcePlantUML is an open-source tool that allows users to generate a wide variety of UML and other diagram types from a simple human-readable text description. It supports sequences, use case, class, activity, component, state, object, deployment, timing diagrams, and more, making it accessible and efficient for technical documentation and visualization.
UMLet
Open SourceUMLet is an open-source, Java-based UML modeling tool designed for both educational purposes and rapid creation of UML diagrams. It supports a wide range of diagram types and offers good integration with popular IDEs.
Calligra Flow
Open SourceCalligra Flow (formerly Kivio) is a free and open-source diagramming software included in the Calligra Office Suite developed by KDE. It specializes in creating various types of diagrams like flowcharts, BPMN diagrams, UML entities, and network maps. Its lightweight nature and extensibility make it a versatile tool for visual communication and planning.
Diagramo
Open SourceDiagramo is a robust, open-source web-based diagramming tool perfect for creating flowcharts, graphs, and various diagrams directly in your browser. Built on HTML5, it offers real-time collaboration and flexible export options, making it accessible and versatile.