Dynamically generating workflow and relationship images to the Web

Is there a good toolkit (open source maybe) out there that will allow me to dynamically draw images containing a workflow or show relationships? I only see packages that are geared for charts, I want to dynamically draw the dependency between 2 or more objects on the fly. To be able to do that I need to be able to draw rectangles (2 or 3d), lines with ends (as in Visio or something) and draw text in the box representing the entity name. I don't want to have to code all this myself using BufferedImage etc. Looking for a nice little toolkit.
Thanks

We really need to see what you're seeing.
Can you post links to before and after?

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