Windows 8.1 isn't just good news for users, as the new OS version is also bringing the goodies for developers as well, in the form of 5,000 new APIs for devs to play with. Along with 8.1's arrival is a new version of Visual Studio that'll allow devs to write native apps for Windows 8 and optimize them for the platform. The software comes with all the diagnostic tools any good Win8 developer needs, including a way to see an app's power consumption and network efficiency. The Visual Studio 2013 preview is available for download today, so devs anxious to dig in can do so at the source below.