A 3x3x3 with a hole through the center.
CUBE (SHAPE PRESERVING)
A variation on the Helicopter Cube that uses curved cuts to reveal the otherwise hidden centerpieces.
A twisty puzzle cube that turns around its corners. A faceless Compy Cube.
The deepcut corner turning cube.
CUBE (SHAPE CHANGING)
A Square-1 with an internal blocking of movements. A Square-1 even more bandaged.
A 3x3x3 with the cutting planes rotated by 60° around a corner.
The Bump Cube is a simple 3x3x3 Rubik's cube, but with an interesting twist. It spawned a whole series of puzzles and created a verb of its own.
Taking the concept of the Rubik's cube and turning it 45 degrees.
A 3x3x3 placed in midturn and reoriented in its original shape. Every piece is of unique shape and therefore sticker can be unicoloured.
This is a newer version of the Megaminx, published by Meffert, with tiles and 12 distinct colors.
A Halpern-Meier-Tetrahedron (aka Jings Pyraminx) without edges.
ROUND CONVEX SHAPES
A 3x3x3 truncated into three round surfaces in a spiral pattern.
HEADS & OBJECTS
Possibly another clone of Rubik's Snake. This time from Spain.