Imperious RexA Rex Cube customly painted based on the Marvel character named Sub Mariner.
Indalo CubeA Bed cube painted by hand to resemble the lucky symbol of the province of Almería, (Andalucia, España).
Isolated CubeA 3x3x3 bandaged with a plastic plane covering one side of a cube and four edges truncated. It implements a new type of bandaging.
Ivy Eye (IVI)An Ivy Cube (Eye Skewb) with faces cut in an eye pattern to show the orientation of the hidden corners.
Jade SkewbA skewb in shape of a truncated triakis tetrahedron.
Jessen's 2x2x2A straightforward (?) shape variant. In this case the shape is Jessen's Orthogonal Icosahedron.
Jewel TrapA corner turning tetragonal trapezohedron. A jumbling only puzzle.
Jumble OctahedronA puzzle with the jumbling only axis system based on the Triakis Tetrahedron.
Justice League CubeA 3x3x3 covered with symbols from the heroes of the DC franchise of the same name.