King's CubeA cornerless 3x3x3 with additional pieces which gave it the look of a 3x3x5.
KolasA 3x3x3 bandaged and extended with cubies glued on.
KupalaA 3x3x3 bandaged and extended with cubies glued on.
L-Cube HybridThe L-Cube from Calvins Cuboid series with circles on two sides.
Magic DominoThe 1982 Politoys version with a spindle mechanism.
Mahjongg DominoThis Domino shows symbols taken from the Mahjongg-game. Also exists as Black/White.
Master QuartetThe bigger cousin of the Quartet with two layers on each side.
Mental BlockToday this can be considered as one of Tony Fisher's classical Skewb modifications.