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Re:Natron: Open-source compositing software for Mac, Windows... by Joeboy on Sunday June 26, 2016 @07:30AM (#11980350)
I tried maybe a dozen FOSS NLEs before finding Blender. Many, many years ago I used Premier.

The other big node-based thing is audio synthesis / effects, for example Pure Data. As far as I know these are the only areas where dataflow programming has really taken off.

Re:Natron: Open-source compositing software for Mac, Windows... by tjl on Sunday June 26, 2016 @02:28PM (#11981967)
LabView is node-based. It's extremely popular (and quite old).

http://www.ni.com/labview/

Matlab's Simulink is also node-based (probably because of LabView). It's also widely used.

http://www.mathworks.com/products/simulink/