Wingtip
A wingtip is a part of a plane that is most distant from the fuselage of a fixed-wing aircraft. Because the wingtip shape influences the size and drag of the wingtip vortices, the tip size has produced a diversity of shapes and sizes.
Those are:
Squared-off
Aluminium tube blow
Horner style
Winglets
Drooped tips
Raked wingtips
Tip tanks
Sails
Fences
End plates