Even though Microsoft launched their latest Windows Phone 8 for consumers, they intentionally didn’t reveal the SDK (Software Development Kit) for developers. Actually it was handed to some top, premium developers only for early preview. The mass availability had already become a concern for other especially small developers. And Microsoft not announcing along side WP8 irked developers even more. Without making them wait any further, Microsoft has made their SDK for WP8 available for everyone at BUILD conference. You can get it right away from the download page. The SDK embeds Visual Studio 2012 Express edition and works as a ad-on with Visual 2012 Professional or Premium or Ultimate.
To run the SDK, you’d need a computer with 4GB of RAM, 4GB of free space on hard drive and a 64 bit (x64) CPU which also supports SLAT (Second Level Address Translation). It is supported on Windows 8 Pro and higher editions. Had Microsoft released it before, developers would have readied their apps for Windows Phone 8 by now. But it’s never too late.