Draw many different kinds of diagrams such as, entity relationship, UML, flowcharts, network diagrams, using Dia.
Dia is inspired by the commercial Windows program 'Visio'. It is a full-featured diagramming program with special objects which help you draw any supported kind of diagram. Your work can be loaded and saved to a custom XML format (gzip by default), exported to a number of formats, including EPS, SVG, XFIG, WMF and PNG, and printed (including ones that span multiple pages).
Dia is compatible with Windows 2000/XP/Vista/7, Wine on Linux/UNIX.
In order to install Dia portable for Windows, download "DiaPortable_0.97.paf.exe" and extract Dia's files into a folder of your choice. Then run "DiaPortable.exe". Please notice that if your installation path has any unicode characters, Dia might have problem to run.
Enjoy!