Worth noting that Story of Your Life is the basis for 2016’s Arrival:
More on-topic, I recently realized that Heptabase reminds me a lot of Plectica:
I used Plectica a bunch when it was free, but switched (back) to doing these kinds of maps in OmniGraffle.
So in this specific arena, there’s Heptabase, Plectica, Clover, TinderBox…
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