Software builders with a can-do attitude should be delighted to learn that the SDK for Sailfish OS has arrived just a few days late of its pencilled-in due date. Jolla, the company behind the open-source MeeGo revival, has crafted versions for developers using Windows and OS X as well as 32- and 64-bit Linux machines. It's available for free at the source link, with the aquatic caveat that the SDK is just a minnow, but the company hopes you won't toss it back straight away.