Proportional OhA proportional version of the Oh Cube, which is an earlier design of the same designer.
Puck 2/16Two 16-segmented circles on a 1x1x2.
Quad-XAn edge-turning hexahedron with cuts deeper than the Helicopter Cube.
Raptor CubeA Rex Cube newly designed to include the corners of a Compy Cube
Raptor SkewbA corner turning hexahedron with three cuts per axis. It combines Skewb and Raptor Cube.
Redi 3x3x3A hybrid puzzle consisting of the abilities of a Redi Cube and a 3x3x3.
Redi CubeA twisty puzzle cube that turns around its corners. A faceless Compy Cube.
Rex 3x3x3A hybrid puzzle combining the 3x3x3 with a rex cube.
Rex cubeA corner-turning hexahedron. Very similar to the MasterSkewb but without its corners.
Rex SkewbA combination of Skewb and Rex Cube like the name says.
Rex Skewb 2x2x2Combines the cuts of the Rex Skewb (which itself combines two sets of cuts) with the 2x2x2.
Rhino CubeA puzzle with hybrid axis system consisting of a 3x3x3 and half of a Compy Cube.
Roadblock IA cubic 3x3x9 with some traditional corner pieces inserted. A puzzle out of a series of cubes that behave like a bandaged 9x9x9.
Roadblock IIA cubic 3x3x9 with four traditional corner pieces inserted. A puzzle out of a series of cubes that behave like a bandaged 9x9x9.