(can use a smartphone as HMD)
* [[Mozilla A-Frame]] is a markup language (as are HTML and XML) for making cross-platform VR software. To see it in action, visit their site on your smartphone, turn off orientation lock, and press the VR button that appears.* [[Vizor]] is a web app that allows you to construct 3D scenes and view them across numerous platforms, including from mobile devices. Although it isn't as powerful as a game engine or open-source web platform, it is very straightforward and a great way to start creating in VR without an expensive headset. The [[Vizor blog]] has several tutorial posts.* [[Responsive WebVR]] is a cross-platform, web-based VR platform [[available for modification on GitHub]]. You'll probably want to brush up on [[Three.js]].
===Unreleased, but preliminary development possible:===
* [[Google Daydream]] - unavailable but supported by UE4 now, Unity support coming in the summer
* [[OSVR HDK 2, $399]] - will be released in July; no announced motion control