These are the Aviiq Ready Clip cables. They are made short, so that they don’t tangle when you carry them around.
They come with standard USB-type connectors, and mini, micro or Apple 30 pin connector. The connector works just like any sync cable but is very short. This means you don’t have a tangled mess on your desk, or in your travel bag.
They are a bit more durable than the stock cables that come with the iPhone or iPad.
You can see it here.