Buzz
Dia Diagram Editor, an open-source software, is a free diagramming tool available for Windows, Mac OS X, and Linux. With support for over 30 different diagram types including flowcharts, entity-relationship diagrams, UML diagrams, network diagrams, and database models, it offers a comprehensive solution for professional diagramming needs.
Key features and highlights:
- - Structured diagramming capability.
- Simple, intuitive, and user-friendly interface.
- Over 1000 pre-defined objects and symbols.
- Various import and export formats such as EPS, SVG, XFIG, WMF, and PNG, along with print support.
- Cross-platform compatibility with Windows, Mac OS X, and Linux.
- Scriptable via Python.
- Multilingual support (including Vietnamese) with over 60 languages supported, ensuring ease of use for users worldwide.
You can download Dia Diagram Editor for free from the official website at http://dia-installer.de/index.html.en
2. yEd Graph Editor
yEd Graph Editor is a tool that helps you create diagrams, flowcharts, and various other graphs. yEd can be used to draw many different types of diagrams including charts, network diagrams, UMLs, BPMN, mind maps, organizational charts, and entity-relationship diagrams. yEd also allows the use of custom vector and raster graphics as diagram elements.
Key features:
- - Support for multiple graph elements with a variety of node shapes and edge types, expandable group nodes, collapsible nodes, flowchart symbols, entity-relationship diagram symbols, and more.
- Intuitive user interface.
- Clear data representation.
- Automatic layout: supports mathematical layout algorithms used to automatically arrange diagram elements.
- Import data from various formats: GraphML, XLS, GEDCOM, GML, XML, etc.
- Export diagrams to various formats including GIF, JPEG, PNG, EMF, BMP, PDF, EPS, and SVG, it also supports exporting to SWF file format and HTML image map.
You can download yEd Graph Editor for free from the official website at https://www.yworks.com/products/yed
3. ClickCharts Diagram
ClickCharts is a diagramming application that allows you to build virtually any type of diagram or flowchart you need. It has some template diagrams to help you get started or you can start with a blank page.
Key features and highlights:
- - Intuitive user interface for easy use.
- Support for numerous icons and styles of line connectors, shapes, and colors.
- Lightweight, fast, and easy to navigate.
- Open multiple diagrams and edit simultaneously.
- Print large diagrams with seamless tiling.
- Export diagrams as image files such as jpg, gif, png...
You can download ClickChart Diagram for free from the official website at https://www.nchsoftware.com/chart/index.html
4. LibreOffice Draw
LibreOffice is a comprehensive office suite that you can easily download, install, and use. It is translated into over 30 languages and available for all operating systems including Microsoft Windows, Mac OS X, and GNU/Linux.
LibreOffice Draw is integrated into LibreOffice to help you easily create diagrams with an intuitive interface. With LibreOffice Draw, you can easily add shapes, symbols, lines, etc. You can use the flexible features in LibreOffice Draw to draw diagrams most effectively.
Key features and highlights:
- - Support for block shapes, arrowed lines for diagram drawing.
- Easily create dynamic 3D illustrations and special effects.
- Support for creating smart connectors to quickly connect block shapes.
- Custom page sizes.
You can download LibreOffice for free here https://www.libreoffice.org/download/download/
5. Diagram Designer
Diagram Designer is a vector graphics editor that allows you to create UML class diagrams, illustrations, flowcharts, and presentations. The application includes a customizable object table, spell checker, and simple graph chart that allows you to draw mathematical expressions.
Key features include:
- - Import/export images in WMF, EMF, BMP, JPEG, PNG, MNG, ICO, GIF, and PCX formats.
- Customizable object table.
- Simple and visually appealing application interface.
- Easy-to-use drag-and-drop feature.
- Efficiently draw diagrams, mathematical expressions, and block diagrams.
You can download Diagram Designer for free from the official website at http://www.meesoft.com/
Above are the top 5 best free diagramming software. You can choose the most suitable software based on their features and download them directly from the links below. We hope you will find the best diagramming software to use.
