HexicleA custom made variant of Kvadratura kruga with seven circles turned in steps of 60°.
HorVer-PuzzleFour pairwise intersecting plungers with sixteen pieces.
Hyper LooperThree circles on one line, each allowing 180° turns with very deep intersections.
IQ LollyA set of three puzzles differing only in size and the number of tiles.
itSimilar to Tsukuda's Square. Marketed in Britain.
ItaliaTwo rotating circles and one plunger make up the italian flag.