Macro System for osCommerce is a perfect tool that automates routine content operations. You won't need to go over each product and edit the text. Especially usefull if you have many products with similar descriptions.
Proforma is a content management system for osCommerce which allows you to create forms and content, then place them anywhere in your store. You can also edit existing product descriptions, newsletters and product notifications with a single click.
Power SEO for osCommerce - osCommerce module is a powerful replacement for standard osCommerce SEO URLs feature with unique possibilities that work for Search Engine Optimization of your site.
Mass AdWords Product Ads for will help you to easily create separate ads in Google AdWords for EACH product in your store. You can do it once for complete store, creating hundreds or thousands of ads or just select a few products to create ads for
Display unlimited standalone images for a gallery effect, or link them to product attributes so users can see their price differentials and add them to the cart. All thumbnails can be clicked to see larger pictures without reloading the page.