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



Dia vs draw.io Comments
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.