Dia supports exporting to many other types of file, such as:
Computer Graphics Metafile (.cgm)
Dia Native Diagram (.dia)
Dia Shape File (.shape)
AutoCad Drawing eXchange Format (.dxf)
HP Graphics Language (.plt, .hpgl)
Encapsulated Postscript (.eps, .epsi)
Portable Network Graphics (.png)
Scalable Vector Graphics (.svg)
Scalable Vector Graphics gzip compressed (.svgz)
TeX Metapost macros (.mp)
TeX PSTricks macros (.tex)
WordPerfect Graphics (.wpg)
XFig format (.fig)
XSLT (eXtensible Stylesheet Language Transformation) (.code)
To create a file in one of these formats, select File->Export... from the Main Popup Menu. Choose a name and the desired format in the resulting dialog, which works like a save dialog. An appropriate file extension is automatically added.