Here is the list of the most interesting osCommerce add-ons recently released:

Cool Shopping Cart in Header – it will remove osCommerce images from header for shopping cart/my account and replace them with a nicer shopping cart, number of items in cart and total amount. If the customer removes all items from their cart, the cart image will go back to appearing empty
Shipping Quote/Estimation in Shopping Cart (AJAX) – provides a shipping quote infobox within the Shopping Cart, based on Weight/Postcode. It makes no difference whether the customer is registered, or …

Google Analytics represents a must-have tool for every eCommerce website. For online shops it is highly recommended to implement also the eCommerce tracking module, which is not activated by default in the basic version of Google Analytics.
What will bring this module for you? It will record the online transactions and will link revenues to visitors, content and traffic sources, helping you making decisions related to the marketing campaigns and the website in order to reduce the abandon rate and increase conversions.
Check this short clip to get familiar with the GA …

After the article Best add-ons for osCommerce, we come with another list of useful contributions that will help your osCommerce to save your time, upsell, increase conversion,  generate statistics and improve the design of your pages:

Buy_Two_Module – allows you to bundle 2 products in order to sell more. In the product A page you’ll have a recommendation box to buy product A + product B together at a discounted price. This module shows also how much you save buying the 2 products together than separated, and when you click the …

The success of osCommerce is secured by a great and active community (3286 new uploaded files to Community Add-On Packages only in 2008) where members help one another out and participate in development issues reflecting upon the current state of the project. Here is a list of the best add-ons (and free, of course!):

Ultimate SEO URLs – This contribution builds on the cName & pName code to give an even more flexible, search engine friendly, and cross server compatible SEO URLs
Easy Populate & Products Attributes – Makes it simple to …