https://github.com/JirkaDellOro/FreeMindViewer/blob/master/README.md
Advantages:
– only requires JavaScript to display the mindmap
– can accept mindmap files from external web address, so it is enough to use free hosting of Github to view mindmaps online
– open source, with MIT license
Disadvantages:
– only parse basic properties of the nodes (e.g. text color is displayed, but the Freemind “cloud” around a node is skipped)
– only support Freemind format (mindmaps from recent versions of Freeplane are not supported)
My general remark: this tool is good enough for sharing mindmaps, if we follow the “simplicity” concept of Freemind.
FreeMindViewer