While not a visual "maker," this deserves mention for performance modding.
A focus tree is useless if it doesn't do anything. Use the tool’s "Effects" menu to add: For internal management. hoi4 focus tree maker
: Place nodes, assign a country tag (e.g., GER for Germany), and define the layout coordinates. While not a visual "maker," this deserves mention
: Easily establish "purple" connectors for multiple prerequisites or "red" lines for mutually exclusive political paths. From Planning to Implementation How to Make a Focus Tree | PDXCON2019 While not a visual "maker