AruslokyTwo rotating circles - very similar to the Cohan Circle puzzle.
Brams SquareA puzzle which combines intersecting plungers with rotations of large portions.
Bubbles in a planeA 2D-puzzle that works only because it was fudged and still it demonstrates jumbling.
Cohan CircleTwo intersecting circles. There exists a newer relative named Arusloky.
ComboSimilar in concept to a number of other puzzles.
Crossover puzzleA puzzle back from the early 1980s produced by Nintendo. It works with intersecting plunges and polarised light.
DiogenesThree layers, ten segments and an unusual mechanism.
Double DiskA puzzle with four rotating intersecting circles.
Dual CircleDual Circle - surprisingly enough is two interlocking circles - pieces move when the circles are turned.
Elemental:Beryllium-10The third member of the series of Elementals. This time there are 4 plungers of which 2 are side by side.