Not free, but you can use it developer mode to create compelling image-based Augmented Reality experiences. Great tool
An app with which to make AR (Mac)
Fabulous, free, AR making tool.
A library to be used with AR/VR tool A-Frame that provides the ability to import 3D panorama frames.
A search engine to find XR sites.
Tools to help you create Augmented experiences.
Create AR audio walks with this tool.
A huges collection of articles about AR and VR projects
Created by the XRStories team at the University of York, the ExpoDubai app is a VR experience that has landscapes, treasures, quests and even dragons.
Go get the app and travel around the exhibition, it's pretty amazing.