Ask HN: good mind mapping software?

Hi all,

I use mind mapping and diagramming software all the time, and was wondering if you've run into anything particularly useful. Some features I'm always looking for are:

-Good keyboard shortcuts

-Ability to expand/collapse views

-Ability to insert a step in between two already existing pieces

So far the best applications I've found have been:

-https://bubbl.us/ . Web app, has a free version, fast and useful keyboard shortcuts.

-http://www.umlet.com/ . Good for general purpose diagramming and flow charts, produces highly customizable diagrams.

-http://checkvist.com/ . Good keyboard shortcuts, nesting, ability to add new steps afterwards...the only issue I have with Checkvist is that it organizes information into a list format, rather than a mind map format.

Thanks!