I found both of these in Canadian Tire.
The first is a carabiner LED keychain. This cute little green number has a light ring around the switch, which glows when you press the button. Unfortunately, this is one of those constant press to get light type switches.
The carabiner is large enough to fit several key rings inside, or just to hang if off your current key rig.
Next up is an X-Drive Pocket Driver Tool 6 in 1. This is made more for hanging off of a current key-ring rig. This mini driver tool comes with dual LED that embrace the 1/4" bit driver on the front end. The switch is of the constant press to get light type.
Open a small door, and you are greeted by a 4 bit drivers. They are held in there very loosely, and thus care must be exercised when extracting one, else you will be always picking them up. I am talking from experience here.
And of course, the screwdriver bits fit in the front face of the tool. At least the LEDs will illuminate anything you want to apply the driver to.
So there you have it, two Swiss+Tech pocket key-chain light solutions.