Junior PrismA Pyraminx transformed into a concave triangular prism.
Kepler CubeAnother great puzzle by Katsuhiko Okamoto who relies heavily on his famous void cube.
Kevin's TetrahedronA 3x3x3 transformed into a tetrahedrons shape. Built with "cut and paste" method.
Knob CubeA 3x3x3 with one set of 4 cubies added to each side.
Latch CubeA 3x3x3 with innovatively restricted movements.
Leaf CubeA truncated 3x3x3 puzzle in the shape of leaves.
Lily CubeA newly design 12-axis puzzle in shape of a sphere.
LinkubA cube bandaged by connecting three pairs of pieces with a rope.
Lotus IA vertex-turning rhombohedron.
Lotus IIA vertex-turning square antiprism with the shape of a Gyroelongated Square Dipyramid which is a Johnson solid.
Lozenge PrismA truncated and extended 3x3x3. Similar but not equal to Greenhills Cube.