Floppy Cube
This puzzle is commercially available and is also known as the 1x3x3 Cuboid.
Java Applet Instructions

The Green Flag resets the puzzle.

Pressing the Spacebar scrambles the puzzle.

Down Arrow turns the bottom three cubelets by 180 degrees. The same can be achieved by clicking on the top of the central
bottom cubelet.

Right Arrow turns the rightmost three cubelets by 180 degrees. The same can be achieved by clicking on the top of
the central right cubelet.

Left Arrow turns the leftmost three cubelets by 180 degrees. The same can be achieved by clicking on the
top of the central left cubelet.

Up Arrow turns the back three cubelets by 180 degrees. The same can be achieved by clicking on the
top of the central back (top) cubelet.

To solve the prism, you have to get the top side yellow,
the left side blue and the front side red. (The green right side,
orange back side, and the white bottom are invisible.)

When you have solved the puzzle, your time taken is displayed
for 5 seconds.
Solution Strategy

The positions of the center and the central
edge pieces never change. The central edge pieces may get
flipped over by 180 degrees, though.

First get the positions of the corners right without taking
any orientations into account. The corners will automatically
be oriented correctly.

If necessary, flip the central edge pieces over in pairs.
For instance, to flip the left and front central edge pieces
over, use L  F  L  F  L  F.

Done! With some practise, your average time should not be more than a few seconds.