Every so often, people ask about traction devices for winter use.
While technical mountaineering is far outside the scope for most of us (myself included), you will often encounter stretches of icy trail in not only winter, but also in the shoulder seasons.
This link provides a wonderful overview of traction devices for lighter footwear. Though aimed for trail running, it can apply to hiking. By the author's own admission, he often power hikes the steeper uphills. So the info can be useful.
http://mountainrunning.com/features/..._08/index.html