Scapple

Mac/Windows Free-Form MindMap app

https://www.literatureandlatte.com/scapple.php

http://www.makeuseof.com/tag/scapple-lets-organize-thoughts-however-like/

ooh, file format is XML (and so is FreeMind)...

• and you can link a chunk of text within a node (it's more precise, but thus less obvious, than linking the whole node) (NodeWeb)
  • the XML in such a case looks like:

        <Note ID="3" FontSize="12.0" Position="415.0,110.0" Width="165.0">
            <Appearance>
                <Alignment>Left</Alignment>
            </Appearance>
            <String>Elite Coaches Irritated by 
Volume of Unqualified Emails</String>
            <Formatting>
                <FormatRange Link="http://webseitz.fluxent.com/linked">0,56</FormatRange>
            </Formatting>
        </Note>