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.

ChessBase Support - Details

DeepMind: AI algorithm learns how to beat expert players at complex board game Stratego, Science

Your Gateway to the World of Chess – Chess Forum

Opening repertoire study with spaced repetition (+ database and game collections) - Chess Forums

Chess Repertoire Explorer

Opening Book - Chessprogramming wiki

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ChessBase opening tree statistics

Opening repertoire study with spaced repetition (+ database and game collections) - Chess Forums

Today I released chessopener.com, a small web application to easily explore, analyse and practice chess openings : r/chess

Different ways to visualize chess openings, what's your favorite? : r/chess

ChessBase opening tree statistics

Your Gateway to the World of Chess – Chess Forum

Opening Tree Which chess app?