Program for creating an opening tree - Chess Forums

What's a program I can use for recording variations where the moves are put in a tree format? What I'm looking for is something similar to another site's "study" only with all the lines and sub lines with same-size text in a tree format like in the book MCO-15.

Gentronix

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I made a program to automatically generate a practical opening repertoire for any opening. : r/chess

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First test release of my tool! What's the opening of your choice? : r/chess