AruslokyTwo rotating circles - very similar to the Cohan Circle puzzle.
Cohan CircleTwo intersecting circles. There exists a newer relative named Arusloky.
GrippleAn uncommon puzzle produced in Hong Kong.
Handy Mad TriadTwist the fingertips to rotate the four overlapping discs of wedges.
OlimpicA custom built puzzle with an Olympic Rings theme.
Pascals JumbleA puzzle with moving circles specifically made to allow jumbling moves
Puzzler - AvengerRotate each half to scramble or return colors. The most difficult of the three versions
Puzzler - ChallengerRotate each half to scramble or return colors. The variant with medium difficulty.