osc2ebay allow the synchronization from your osCommerce shop to your ebay shop.

This contribution is completely web-based, it use SOAP and the ebay API to synchronize items.

It's released as an open source package under GPL license.

Official support post, and Download link: http://forums.oscommerce.com/topic/385422-contribution-osc2ebay-oscommerce-to-ebay-synchronization/