This module creates a set of up to three dropdown attribute filters, so that product lists can be filtered by specific attributes, such as color, size, width etc. It's ideal for sites that sell shoes, clothing or other products that have standard sets of attributes.
If none of the products in the listing have any option values for the selected option name, then that particular filter will NOT be shown above the product list. The values shown in the dropdown filters will only be those that are relevant for the products in the list. So if for example you have a couple of color values assigned for the Color option name that aren't assigned to any of the listed products, those colors will not appear in the filter list seen by the customer.
At this stage, you cannot select different filters for different categories - the same three filters will apply to all product listings. I am considering further development of this module so that you can assign different filters to each category, but it will likely be some time before that feature is available.
You can see a demonstration of this module here
