Tool used to create chess analysis interactive diagrams in many chess stack exchange answers - Chess Meta Stack Exchange

I'm new here, and I would like to know how some members of this forum are creating these nice chess diagrams for analysing positions in their answers, the picture below explains well what I'm meani

ChessY: A Mathematica toolbox for the generation, visualization and analysis of positional chess graphs - ScienceDirect

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Chess Dr Eric Silverman

I've developed ChessMonitor: a website to show statistics for players based on Lichess and Chess.com games. Here is an example for Hikaru. You can also get your own page! (link in comments)