Bram's FortressEight cubes which outwards going faces twist connected to each other in sets of four faces.
Chaos cuboid 3x5x5A Siamese Cube with several cubies glued on to give it the look of a 3x5x5.
Chimera BridgesEight AI Cubes connected with twelve bridges each consisting of eigth cubies glued to adjacent bandaged blocks.
Chimera Bridges IIEight Chimera Cubes connected with twelve bridges each consisting of a non-functional 3x3x3 glued to adjacent bandaged blocks.
ChinookTwo Helicopter cubes fused together.
ColumnCubes CE+CEThree 3x3x3 connected to each other to implement three different subgroups.
ColumnCubes E+EThree 3x3x3's "siamesed" with the help of 2 throughgoing edge-blocks.
Conjoined Fisher cubeTwo Fisher Cubes glued together thereby reimplementing Fused Cubes with internal twists.
Cross Windows CubeEight 3x3x3s connected with twelve bridges each consisting of a single cubie glued to the adjacent corners.
Cube TwisterEight 3x3x3s connected into one massive puzzle with interconnected movement.
Cubes on a DiskTwo 4x4x4 connected with a disk which allows to exchange pieces between the puzzles.
Cubie Chaos 1A small number of Eastsheen 2x2x2s joined and extended to form a 2x4x5 block which poses a new kind of challenge.