Aetna CubeThis promo cube features Aetna life insurance.
Binder CubeAnother German promo cube, this one for a company called "Binder Kunststofftechnik GMBH".
Chex & Fruit Puzzle CubeThis cube displays Chex cereal on one side, and 5 types of fruit on the other five sides. This was a mail-order product which required proofs of purchase from Chex(tm) Cereal in order to buy.
Clock 4x4Rubiks Clock scaled up to greater size.
Clockwork 4x4x4A 4x4x4 with all layers of one dimension linked into one coordinated movement.
Columbus EggA yellow version with identical markings also exists. There is also a version with Columbus' EGG written on it. These are yellow, white, and blue.