These are puzzles that have six axes and can be solved like the Rubik's Cube.
2x2x2 Pocket Cube [USA vacation, summer 1998]
3x3x3 Cube [childhood]
4x4x4 Master Cube resp. Rubik's Revenge [childhood]
5x5x5 Professor's Cube [birthday present 2002, official Rubik's homepage]
All four cubes are originally by Rubik's but from different generations as can be seen on the labels.
3x3x3 Cubes [flea market, approximately 1 € a piece]
Art made of Rubik's Cubes: The different kind of Christmas decoration.
All these Cubes are originals from different years: The very first ones didn't have logos. Then there are two Cubes with logos from the 80s and the late 90s. In 2005 there was a 25 years anniversary logo which is multi-colored [flea market, 0,50 €, May 2008]. The other multi-colored logo does not have the years on it.
3x3x3 Cube with tiles, 1.75 inches tall [flea market, 0,50 €, fall 2007]
3x3x3 keychain, knock off [flea market, 0,50 €, fall 2007]
two other Cubes of the same size, one with dots and the other one with a purple instead of a white face [adventcalendar presents 2007]
3x3x3 Mini Cube [present, flea market]
3x3x3 Micro Cube [present, used to be on a necklace]
Promotional Cubes:
ZDF Mainzelmännchen [flea market, 0,50 €]
Warsteiner [present, 2005]
Commerzbank [flea market, 0,50 €, fall 2007]
Monacor [present, fall 2007]
several [flea market, present, fall 2007]
Picture Cubes
Mickey Mouses [present, summer 2007]
Winnie the Pooh [present, summer 2007]
3D Dice Cube [flea market, 0,30 €, January 2008]
2x Sudoku Cube [present, summer 2007]
Sudoku Puzzle-Cube from Nanu Nana [present, fall 2007]
The black Sudoku Cube differs from the other two: On the other two the numbers are arranged in the same way on each face with the 5 always being in the center. On the black one the numbers are mixed up differently on each face, but there are still the numbers 1 through 9 on each face.
Sticker Variations:
Glitter Cube [present, flea market]
neon-colored stickers [flea market]
round stickers [flea market]
Different forms of the 3x3x3:
Magic Ball [Christmas present 2007, in it's original box]
Truncated 3x3x3 Cube [eBay]
The Truncated Cube is a little smaller than an original 3x3x3 Cube whereas the ball-shaped 3x3x3 is bigger. Both can be solved just like a regular 3x3x3 Cube.
3x3x3 Cube for the Blind [flea market, 1 €]
As a special ed. teacher I was especially happy to find this Cube for the Blind!
Octagon or Barrel [eBay]
The Octagon is just like a 3x3x3 Cube (and can be solved like such), except its vertical edges are truncated.
Diamond Style Puzzler or Rhombenkuboktaeder [flea market; flea market, 2 €, fall 2007]
This, too,
is a variation of the 3x3x3 Cube and can be solved as such. I got this puzzle at the last stand when I had already given up hope of finding something for my collection. The second one was found two years later.
Rubik's World 2x2x2 [toy store, 13,99 €, May 2007]
There is something new by Rubik's on the market. This globe can be solved like a 2x2x2 Cube, but first one needs to know what's where. In the 80s there was a 3x3x3 version of Rubik's World.
K-Ball [flea market, 0,50 €, April 2008]
K-Ball "Heart" [flea market, 0,50 €, July 2008]
K-Ball "Braille" by gutoy's [flea market, 1,50 €, May 2008]
Just like the globe above these can be solved like a 2x2x2.
Darth Maul Head [birthday present, July 2008]
2x2x2 Variation
2x2x2 Brain [present, February 2008]
This promotional item can be solved like a 2x2x2 Cube.
Figurenmatch [present, spring 2002]
This puzzle was made in GDR. It can be solved like a 2x2x2 Cube, but in order to do that you need to be able to
imagine the axes. A newer version by Meffert's is called Pyramorphix.
Stern, sometimes called Starburst [flea market, in its original box]
The Stern was made in GDR as well and can be created from parts of two
Figurenmatchs. It can be solved like a 2x2x2 Cube, too. The newer version Starburst has a different color scheme.
Okki, sometimes Polka-Diamond [Flohmarkt, 0,30 €, fall 2007]
Okki can be solved like a 2x2x2 cube.