By Eric AuchardFRANKFURT (Reuters)- WireNews - EBay Inc on Monday unveiled plans to let outside software programs work inside the world’s largest e-commerce site, joining a trend toward openness that fueled the popularity of the social network website Facebook.At the online auction leader’s annual conference for software developers in Chicago, eBay is laying out Project Echo, a plan to give independent developers a path to having their software featured within eBay’s core site.The move, which the company plans to begin testing later this year, will allow third-party software programs to work within eBay’s Selling Manager, which functions as a central sales management dashboard for 700,000 eBay sellers.We are opening up the eBay site to help developers and sellers make more money, which is what this is all about, Max Mancini, eBay’s senior director of Platform and Disruptive Innovation, said in an interview.Across the Web, companies are opening up their software platforms to act as distribution hubs for outsider developers.Facebook has attracted a vast new audience since it did this a year ago. Outside developers have built 24,000 new applications for the social network.Salesforce.com Inc has thousands of business software developers contributing their own applications to its Web-based AppExchange, while Apple Inc has begun wooing outside developers to create programs for the iPhone.

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