This software perfect for you that need build  a digram fast.
This is Simple vector graphics editor for creating flowchart, diagrams and slide shows.

Features:

* Customizable template object palette.
* Import/export WMF, EMF, BMP, JPEG, PNG, MNG, and PCX images.
* Simple graph plotter to plot mathematical expressions.
* Advanced “pocket” calculator with equation solver.
* MeeSoft Image Analyzer integration for bitmap image editing and extended file format support.
* Uses compressed file format for minimizing drawing file size.
* Slide show viewer.
* Spellchecker.
* Online help