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I have to turn out some network topology maps for very large networks. I'd like the format for the maps to be something other people can also edit and contribute to regardless of what software I'm using on my Mac to build them. I don't mind spending money on my end for software, but I can't require that my clients spend any money. I also can't promise my clients are also using OS X -- they could be running Linux or Windows.

Is there best software application on OS X for producing maps that I can share with other, non-OS X, users?

Is there a best format for sharing topology maps that I should use when exporting the maps to disk?

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Graphviz should do the trick. It uses a text file in a markup language called dot. I believe there are a number of apps on the Mac that can create and export/import that format, but otherwise it's a plain text format and can be edited with any text editor.

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Graphviz is not a bad option. I'd forgotten all about it. – Ian C. Apr 19 '12 at 13:47

Google Drawing lets you easily upload and import other graphics and is cross-platform and free.

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