GatherinVR by Queppelin - GatherInVR is a platform for VR meetings and VR conferences and can be customized for any business or company.
Google ARCore - Google Augmented Reality SDK
VeeR VR - Global VR video community
Vuforia SDK - Vuforia is a vision-based augmented reality software platform.
Spatial - Collaborate from anywhere in AR
Wikitude SDK - Wikitude’s all-in-one AR SDK combines 3D tracking technology (SLAM), image recognition and tracking, as well as geo-location for apps.