Plugin for narrowing down product categories?

Hey everyone, i’m looking for a widget to put on my shop page so customers can narrow down products or categories instead of searching for what they want. Something like what this site has ( http://www.shopandroid.com/?utm_source=ac&utm_medium=storemenu&utm_term=accessories&utm_content=menu&utm_campaign=community ) on the right side of the page. Thanks in advance!