Skype's video chat software has been re-engineered to radically cut its energy use on the upcoming Windows 8 operating systems.

BBC: Skype slashes battery use for Windows 8 system launch

So we're trying to use open-source software development ideas to take the tools we've developed internally and make them publicly available.

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If you buy it at a retail store, you're getting only a 25-character code, which you use to activate the software after downloading it at home.

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