What it does: Serves up image ads that hawk consumer products. Each ad contains up to four products as well as a short description, pricing, and links to retailers.

What's cool: The ads are relatively slick, and you get to decide what sorts of things are in them by choosing from 45 categories of stuff. The ads are available in 15 sizes.

Drawbacks: If you make or sell products, especially electronics, the items in Chitika's ads might compete with yours. And the ads allow visitors to preview information about the products without clicking on the ad.

What it pays: From 20 cents to $2 per click, depending on the product

www.chitika.com