Free calls over Skype, the Internet communications service, could be coming soon to the iPhone. Skype, a subsidiary of eBay, said last week at the International Consumer Electronics Show that a version of its Internet calling and instant-messaging software is available for Google’s Android cell phone platform as a free download. It indicated an iPhone Skype program isn’t far behind. Scott Durschlag, Skype’s chief operating officer, said Skype’s iPhone application is still under development. Engineers are still working on cutting the amount of power the application consumes, he said.