Omnigraffle 5
Regardless the esoteric reasons for choosing a hard to remember name like "graffle" for mind mapping, this is one product that really works! This software comes in beta version on new Macs. I wondered what it was for and one day played around with it and found that I could finally mind map without too much cognitive overhead of making connections between ideas in my brain and then having to figure out how to represent that in awkward software. With Omnigraffle, minimum keystrokes arrange the content according to your thinking - WOW!
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Click on the "Play" button in the middle of the screen to see a 4 minute Jing about making a mind map with Omnigraffle.