FreeCAD

FreeCAD v0.16 create two cutting solids select both solids click “boolean operation” → select “merge” → ok now both solids became unvisible and a new fusion is created select the newly created fusion menu → part → refine shape    

FreeCAD version 0.16 create a new sketch close the newly created sketch select a face in the modell click in the toolbar the button “assign sketch to face” choose the newly created sketch from the displayed drop-down-list click ok, done … Continued