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
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.

Most users think Dia is a great draw.io alternative.
Dia is the most popular Windows, Mac & Linux alternative to draw.io.
Dia is the most popular Open Source & free alternative to draw.io.
- 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.