I just learned that Lucidchart does now support offline mind mapping. You can create your flowcharts offline and after you are logged on you can then share them with the rest of the word . Lucid Chart, for those who haven't yet tried it, is a visual collaboration tool that makes drawing diagrams fast and easy. Once installed, you can easily create and edit diagrams online AND offline! When online, easily share your diagrams with others to experience real time collaboration with changes merged and synced instantaneously.
Watch the video below to see what you can do with this mind mapping tool.