MindPreview is a mind mapping tool.
Quoting wikipedia :
A mind map is a diagram used to represent words, ideas, tasks, or other items linked to and arranged radially around a central key word or idea. It is used to generate, visualize, structure, and classify ideas, and as an aid in study, organization, problem solving, decision making, and writing.
FEATURES
Support Floating Topic.(Lite version allows 5 floating topics)
Support Sidebar.
Support QuickLook.
Support Spotlight Search.
Support Photo attachment.
Support XMind.
Support Retina display.
Simple and Quick editing map.
Export as PDF, PNG, XMind, FreeMind, Text format.
Support Undo/Redo.
Support Drag and Drop.
Support Folding nodes.
Support Copy & Paste nodes.
Support themes.
Support background color.
Support background images.
Support Icons(Markers)
