nice library for drawing graphics pipeline workflow

Hi

Is there a nice library out there for drawing graphics pipeling workflow? Something other than the squares and lines as in MS visio. Anyone has suggestions based on something they used and it looks nice?

thanks

What exactely are you trying to acomplish?

I am hoping there is a visio template (another completely different toolkit/library/software is fine as well) to draw my workflow for the software that i am building. I want a big level picture of what the software does - so I need to show some diagrams that say : hey, i took a bunch of buffers, then i ran it through these shaders , i did this with the rasterized image etc etc.

any templated out there so i can get a professional/publishable diagram with pictures of grids , in additional to the flowchart symbols ?

thanks