Skype Goes After Reverse-Engineering
An anonymous reader writes "It appears Microsoft's Skype Division is cracking down on reverse-engineering of the Skype client. Skype recently rolled out a new set of APIs for integration into other desktop applications, but they have issued multiple DMCA takedown notices to a researcher publishing open-source code to send Skype messages."
Skype was like this long before Microsoft. Fring supported video calls to Skype clients for several months, then Skype blocked it: http://blog.fring.com/en/?p=2322