iThoughts is a mind mapping tool for iOS and MacOS X. Maps can be synched among all devices via iCloud or DropBox. I use the latter, which is a bit tricky to set-up, and I run into glitches when using fonts on the Mac that are not available on the mobile devices. Nonetheless, iThoughts scores high at style templates for mind maps. For each level, layout, font, font size, line style and node style can be configured and applied to any other map. Touch interaction is a joy, and the keyboard shortcuts for Mac are quite powerful.
BTW The map above is a User Experience Journey Map for a workshop (slides here).