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It seems odd to me not to mention things like MaxMSP or PD in an article like this. Arguably Max is one of the most successful standalone visual programming languages (standalone in so far as it’s not attached to a game engine or similar - it exists only for its own existence).

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Those two are both primarily for real time signals and music right? That is a great domain for wires, transforms, and pipelines.

Have you ever seen them used in a different context?

GNU Radio Companion is its RF/software-defined radio counterpart: https://wiki.gnuradio.org/index.php?title=Your_First_Flowgra...

Sometimes the flowgraph is too complex to be constructed using the visual editor though, for example gnss-sdr uses C++ to generate the GNU Radio flowgraph: https://gnss-sdr.org/docs/control-plane/

No, they are very tailored to that use case. They arent general languages - but they are still probably the best examples of successful visual programming languages.

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