I have inherited a bunch of graphs in OmniGraffle format which I need to edit. I do not have access to a Mac, and I have no desire to buy OmniGraffle either. I've looked at the
.graffle files which are just zipped XML files, so I guess I could "just" convert them to SVG or Graphviz format myself ... but I hope someone already did the work for me ;)
Are there any free (as in beer and/or speech) tools out there that can convert
.graffle files to a non-proprietary format, preferably Graphviz? Whether the tools is for Windows or Linux doesn't matter.
Failing that, an OmniGraffle → Visio converter?