This pocket calculator is desgined to fit in any pocket, and to be operated using one hand only, thanks to its small size and special shape:

Available from solutions.com.

Is this the less practical electir stapler ever ? If you use the USB hub it contains, probably. Note that the stapler part requires separate batteries. Doh!

Available from gadgetsquick.

Powerizers act like extra muscles and make your steps longer, your jumps higher, and your runs faster:

From gadgetshop.com.

This remembered me old times when I playe with Lego Technics and some PC based controllers:

Available from PC gadgets.com.

This USB hub is made of four cubes that can rotate to position each port exactly where you need it:

From perpetualkid.com.