Diagram Designer is a straightforward vector graphics tool for creating flowcharts, UML class diagrams, and assorted other technical illustrations.

The program is very easy to use. To build flow charts, for instance, you simply drag in the boxes you need from the right hand palette, and drop them onto your page. Double-clicking a box allows you to edit its text (the built-in spell checker will catch errors immediately). You're able to drag and drop your preferred style of connector onto the page, too, and this will easily "snap" onto the box. And you can then drag the boxes around and your connectors will reposition accordingly.

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Download :
Diagram Designer 1.25

Source : downloadcrew.com