Arduino is an open-source electronics platform based on easy-to-use hardware and software. Last week, Microsoft announced that new apps including the Arduino IDE, Evernote, Double Twist, and several others will become available in the Windows Store. As announced, it is now available for download from Windows Store. Arduino IDE was converted into an Universal Windows Platform (UWP) app using the Desktop App Converter. If you are developer and want to bring your desktop app to Windows Store, read about it here.
Download it here from Windows Store.