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What software could I use to rapidly and easily create trees like this:

Tree of thoughts

Looking for freeware. Please supply screenshots where possible. Mind maps are OK as soon as they look like a tree.

Windows and/or Linux. Web-based is great!

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3  
Pen and Paper? :P – Phoshi Sep 27 '09 at 14:34

FreeMind is a premier free mind-mapping software written in Java. (and thus works on all platforms where the Java Runtimes are installed).

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I'm not sure if it's exactly what you are looking for, but Graphviz is good for producing graphs.

enter image description here

It's actually a text format. Here's the code that produced the picture:

digraph SomeTrees {

node  [fontsize=10];

Root -> Item
Root -> "One more item"
"One more item" -> Subitem

Fruit -> Apple
Fruit -> Microsoft
Fruit -> Google

}
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Neat little program! – Clay Nichols Sep 27 '09 at 17:43
    
Graphiz and Gliffy are great alternatives to Visio. – ddri Apr 18 '12 at 12:41

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