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 designed puzzle with 12 axes 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.