VRChat - Create and play in virtual worlds with others
Google ARCore - Google Augmented Reality SDK
Second Life - Second Life is a virtual reality platform where individuals interact in a virtual world. The software was developed in 2003 by Linden Labs. More than one million people now regularly use the software.
Vuforia SDK - Vuforia is a vision-based augmented reality software platform.
Vircadia - Vircadia is an open-source and decentralized real-time VR creation platform for university, enterprise, social, and OpenSim users.
Vuforia - Leading Augmented Rreality platform.