Microsoft says the best way to build HoloLens apps is to use Unity3D. Unity3D, or Unity as some people call it, is a cross-platform game engine. This application was first used to create OS X applications in 2005, but has grown to support more than 15 platforms at the moment. Since one of those platforms is Direct3D on Windows, this was an obvious choice for the HoloLens team as the way to build 3D worlds.
Next to being a game engine, it also is a development environment for this engine, making it a great tool with which to create HoloLens apps. Unity3D natively supports HoloLens as a platform, so you do not need to install plugins.
Unity is not free. However, the Unity Personal license is all ...
