Chines
A chine is a long extension of the wing root along the forward fuselage, first seen on the Lockheed SR-71 Blackbird family. The chines contribute useful additional lift at supersonic speeds, as well as acting as LERX at low speeds. A standard leading edge extension joins to the fuselage at an angle while a chine is an extension of the curvature of the fuselage. Therefore chines avoid presenting corner reflectors or vertical sides to radars.
The F-22 Raptor has chines that lead to the leading-edge extensions that are blended into the engine air intakes.
Canards can also help generate vortex lift over the main wings, but due to their poor stealth characteristics they have been replaced with chines in all fifth-generation jet fighters except for the Chengdu J-20.
Chines have been found to reduce roll stability in some configurations, due to vortex effects.
Read more about this topic: Leading-edge Extension