A free, full-featured IDE for individual developers, open-source projects, academic research, and small professional teams. It replaced the limited "Express" editions.
Microsoft had not yet acquired Xamarin (that deal closed in 2016), but VS 2015 offered deep integration with Xamarin to build native Android and iOS apps using C#. For the first time, a Microsoft IDE felt comfortable building for rival mobile platforms, complete with an Android emulator and iPhone storyboard designer. microsoft visual studio 2015