YAK (Yet Another Kart)
More information: http://bit.ly/wp-yak
Like WP e-Commerce, YAK (Yet Another Kart) is a full-featured plugin for WordPress. Unlike WP e-Commerce, YAK is completely opensource and does not have any paid upgrades. Certain features lacking in the free version of WP e-Commerce, such as Product Search, come by default in YAK.
The plugin is mainly the work of a single developer, and although YAK is completely free, the developer offers a detailed handbook for sale on his site (http://bit.ly/yak-handbook).
What YAK offers
The YAK plugin offers features comparable to, though fewer than, those of WP e-Commerce. Philosophically, the main difference between YAK and WP e-Commerce is that YAK associates all products with posts or pages within WordPress. Instead of creating products directly in the WordPress Dashboard, you just write a new post or page with the product details, adding the price and "buy now" button using text tags. One benefit of this method is that customers can use...