Info:
MESHmachine is a blender mesh modeling addon with a focus on hard surface work without subdivision surfaces.
0.8.2 version for blender 2.93

MESHmachine's chamfer and fillet toolset allows for more flexibility, when dealing with fillet-like surfaces, traditionally created with the Bevel and Bridge tools.
MESHmachine's approach to fillets is the Fuse tool, which builds transitional surfaces from chamfers, fusing the surfaces on both sides.
Doing this, you get the benefits of both - chamfers and fillets - while avoiding their disadvantages.