Tony Buzan's official mind mapping software, iMindMap has just been updated to version 4.0. It's packed with features including:
- a new presentation creator
- audio notes
- "box branches" - add sentences while you think of the right word
- outline text editing
- freeform brainstorming
- enhanced Word import.
They have a special offer - if you purchase iMindMap 3.0 before April 30th then you get a free upgraded to iMindMap 4.0. You can see more here.