<http://schema.org/url>
<http://thenextweb.com/apps/2013/09/14/6-cross-platform-messaging-services-that-work-from-desktop-to-mobile/>
<http://thenextweb.com/apps/2013/09/14/6-cross-platform-messaging-services-that-work-from-desktop-to-mobile/skype-3-2/>