Dia for Linux is roughly inspired by the commercial Windows program '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, and network 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.
What's new in version 0.97.2
Version 0.97.2 has updated translations and added more colors for SADT.