Eastsheen
The Eastsheen cube is a mechanical puzzle that is meant to be smoother and faster than regular Rubik's cubes. They are preferred by most "Speedcubers". Note that the Taiwanese manufacturer, East Sheen Industrial Co., Ltd., brands their cubes as "Eastsheen".
East Sheen manufactures three different types of cubes: the 2x2x2 (Pocket Cube), 4x4x4 (Rubik's Revenge) and 5x5x5 (Professor's Cube) version that comes in black and white.
Mini Cubes are small 2x2x2s with different straps. Multi cubes are joined 2x2x2s. They are also available in units of 2, 3, or 4 connected cubes. Gift Cubes come with special stickers which mostly resemble a picture on each side when solved.
5x5x5 cube
The Eastsheen version of the Professor's Cube uses a mechanism different from its rivals. The fixed centres hold the centre cubelets next to the central edges in place, which in turn hold the edge cubelets. The non-central edges hold the corners in place, and the internal sections of the corner pieces do not reach the centre of the cube.