Edges
Freeslice, then the 3x3 stage.
8x8 and bigger
Cubes beyond the 7x7 are solved the same way, with longer bars and more edge pieces per edge: even sizes behave like the 6x6 and odd sizes like the 7x7. No algorithm sets are published for them; the L2C and L2E ideas carry over, applied to the inner slices that differ.