Dia is free, open-source drawing software for creating structured diagrams. A Windows version is available as a free download, and the download page also provides packages for Mac OS X and Linux. The software is released under the GNU General Public License, GPLv2.
Gephi is free, open-source software for network visualization and analysis. It is available as a desktop application and as Gephi Lite in the browser. It includes algorithms for community detection, centrality measures and clustering, multiple layout algorithms, appearance customization and image exports. The source code is released under the GPL license.
PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. It supports diagram types including sequence, use case, class, object, activity, component, deployment, state and timing diagrams, plus non-UML diagrams. Images can be exported in PNG, LaTeX, EPS and SVG.
Iconoir is an open source icon library distributed under the MIT license. The site states it offers 1,671 icons free for download without email sign-up. Icons are available in SVG, Font, React, React Native, Vue, Flutter, Figma and Framer. From the changelog, the project releases versions adding new icons, with support for SolidJS added in v7.12.0.
lucide-animated is a free open-source collection of over 350 animated React icons built with Motion and Lucide. The icons are MIT licensed, copy-paste ready and fully customizable SVG icons with smooth animations.
Flowgorithm is a free beginner's programming language based on graphical flowcharts. Programs can be executed in Flowgorithm, which can interactively convert flowcharts to over 18 languages including C#, C++, Java, JavaScript, Python and Swift. It features a graphical variable watch window, loops, arrays and multilingual support.
DiagramGPT is an AI diagram generator created by Eraser that generates diagrams from text prompts. Five diagram types are available: flow charts, entity relationship diagrams, cloud architecture diagrams, sequence diagrams and BPMN diagrams. Generated diagrams can be edited in Eraser. An API is available only to Starter, Business and Enterprise Plan teams.
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Gephi is free, open-source software for network visualization and analysis. It is available as a desktop application and as Gephi Lite in the browser. It includes algorithms for community detection, centrality measures and clustering, multiple layout algorithms, appearance customization and image exports. The source code is released under the GPL license.
PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams. It supports diagram types including sequence, use case, class, object, activity, component, deployment, state and timing diagrams, plus non-UML diagrams. Images can be exported in PNG, LaTeX, EPS and SVG.
Iconoir is an open source icon library distributed under the MIT license. The site states it offers 1,671 icons free for download without email sign-up. Icons are available in SVG, Font, React, React Native, Vue, Flutter, Figma and Framer. From the changelog, the project releases versions adding new icons, with support for SolidJS added in v7.12.0.
lucide-animated is a free open-source collection of over 350 animated React icons built with Motion and Lucide. The icons are MIT licensed, copy-paste ready and fully customizable SVG icons with smooth animations.
Flowgorithm is a free beginner's programming language based on graphical flowcharts. Programs can be executed in Flowgorithm, which can interactively convert flowcharts to over 18 languages including C#, C++, Java, JavaScript, Python and Swift. It features a graphical variable watch window, loops, arrays and multilingual support.
DiagramGPT is an AI diagram generator created by Eraser that generates diagrams from text prompts. Five diagram types are available: flow charts, entity relationship diagrams, cloud architecture diagrams, sequence diagrams and BPMN diagrams. Generated diagrams can be edited in Eraser. An API is available only to Starter, Business and Enterprise Plan teams.
