I have a script called FindProducts.

It's based on the site-sift directory script

What it does is that it..

1. Let shop owners to subscribe their products into the categories. They also get an own quality page.
2. Let people search for products by browsing the categories or using the search feature.
3. Search Engines can index many pages and will love it due to Search Engine Optimization-friendly urls and some unique-fresh content functions such as comments for every product page and the newest products are sorted on the front page.

For more features watch this: http://www.findproducts.org/forum/article1.htm

And it's free.

Looks like a good free script with many features.

and welcome to the forum.