Mixup 2x4x4Looks like a 2x4x4 but like the Mixup Cube allows strange moves.
Mixup 3x3x5A cubic 3x3x5 that allows an additional mixup turn.
OctexA fishered Master Skewb.
Octo-StarA face-turning cube, capable of 45 degree turns in some circumstances.
Offset 2x3x3The concepts of the I-Cube and the One-plane-bumped-cube combined.
Offset CubeA cubic 2x2x7 with a twist that allows the pieces to be exchanged between the layers.