Dia
Dia is a program to draw structured diagrams.
- Free • Open Source
- Diagram Editor
- Mac
- Windows
- Linux
- PortableApps.com
- FreeBSD
- Xfce
- DragonFly BSD
- NetBSD
- OpenBSD
What is Dia?
Dia is a GTK+ based diagram creation program for Linux, Unix, Mac OS X and Windows released under the GPL license.
Dia is roughly inspired by the commercial Windows program 
Microsoft Office Visio, though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.
Dia Screenshots
Dia information
Supported Languages
- English
Comments and Reviews
Tags
- Diagram Editor
- UML
- Xfce
- chart
Light, free, simple and many features. Grid snapping can be upgraded thought.
Dia on Linux - shines.
I was able to use it to create all sorts of logic diagrams - for programming and for organization. It is also capable to unite any elements and group and supports layering. Perfect software!
I successfully made some diagrams with Dia but, as another user said, its interface is really clunky. Now I'm trying yED.
Can not dl because source forge certificate is out of date.
[Edited by dimlakgorkehgz, March 28]
OOps that is just because I was downloading it from KFC.
Like that software. It's a bit unhandy sometimes but in the end maybe the best libre software there is for that purpose.
• Complete Component but hard to use - file export are 1 by 1 (cant bulk)
Dia has somewhat stagnated in recent years. For a long time it was the only real open source option other than turning to Inkscape and doing everything from scratch. These days I'd recommend you try Pencil instead because it has a much nicer UI and arguably better features.