I thought this sounded familiar, and I managed to find this app[1] that claims to feature a "2D mind map to keep track of your journey and suggest new paths".

I thought this sounded familiar, and I managed to find this app[1] that claims to feature a "2D mind map to keep track of your journey and suggest new paths". [1]: https://itunes.apple.com/us/app/wikilinks-smart-wikipedia/id990956008?mt=8 https://itunes.apple.com/us/app/wikilinks-smart-wikipedia/id...