Linux got the first 
from Skype when they launched the SkypeKit SDK on Linux before any other operating system. Today, Skype announced SkypeKit availability for both Mac and Windows. This enables almost any desktop application to offer Skype capabilities, including video, voice, and text without the need for users to separately download Skype software. As I've stated before, think of SkypeKit as a "headless" version of Skype - that is, a Skype client with no user interface that runs invisibly, not only on PCs, but also TVs, notebooks, and other connected devices.Interested desktop developers can visit http://developer.skype.com/signup to request an invitation to the beta.
Via Skype Developer Blog
