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Does anyone know of a free tool for easy drawing of revision or integration graphs? I don't mean from existing revision information in the SVN repository, but for planning future integration. Something like the image below: enter image description here

I have tools like Visio and yEd, but I wonder if there is a fit-for-purpose tool out there.

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    Mentioning SVN, I know there's a plugin for Edgewall's Trac building similar graphs. Not that I want you to check that, but: that plugin AFAIK utilizes Graphviz. So while waiting for answers, you could use that keyword with a web search. Count it just as a pointer ;)
    – Izzy
    Commented May 22, 2015 at 11:01

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While I like yEdit, I think that http://www.graphviz.org/ would be the perfect answer, as @Izzy mentions in his comment.

I have been using it for years. It is excellent for drawing any diagram with nodes (trees, network diagrams, sate machines, etc, etc, etc)

Just take a look at the gallery.

It is very stable, very widely used, and well supported. It is also free and cross platform (you didn't state your o/s).

As stated in my well received previous answers recommending the tool, here, here, and here, you write a simple text file, then run it though the tool to draw diagrams of various sorts. There are a plethora of options to configure the layout of the digram which is produced.

Here is a very simple example taken from the examples page of the site:

Input:

graph {  
        a -- b;   
        b -- c;   
        a -- c;   
        d -- c;   
        e -- c;   
        e -- a;   
   }

Output:

enter image description here

I am sure that you can see how this can meet your needs. Just tweak it for line colour, shape of nodes, etc

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    I've used Graphviz a lot before, just hadn't thought of using it for this. Thanks for the recommendation!!
    – Freek8
    Commented May 26, 2015 at 7:09

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