My @FreeCAD addon, "FusedFilamentDesign" has gained a new feature:
The "Auto Fillet" command automatically adds a fillet to each vertical edge of a part. This is a quick and easy way to improve printability of a design.
See docs for details: https://github.com/Rahix/FusedFilamentDesign/blob/main/Documentation/ffDesign_AutoFillet.md