Open-source diagram editor supporting Linux, Windows, Unix, and Mac OS X, with features for constructing entity relationship, UML, flowchart, and network diagrams, customizable with XML-defined shapes, extensibility, and a GTK+-based graphical user interface.
Cost / License
- Free
- Open Source (GPL-2.0)
Application types
Platforms
- Mac
- Windows
- Linux
- PortableApps.com
- FreeBSD
- Xfce
- DragonFly BSD
- NetBSD
- OpenBSD



Comments about Dia as an Alternative to draw.io
Very intuitive, flexible and well defined.

- Dia is Free and Open Source












































Has not been updated since 2014. Was fine at that time, now (2024, ten years after) it's kind of obsolete at least for serious work.