AR Foundation allows you to work with augmented reality platforms in a multi-platform way within Unity.
Lens Studio is an application for creating augmented reality experiences within Snapchat.
Apple's ARKit provides a way to situate stories in the viewer's real environment using augmented reality on Apple devices.
Aero from Adobe is an app for viewing, building, and sharing immersive and interactive AR experiences.
Reality Composer by Apple is an app for producing and prototyping AR experiences directly in AR without prior 3D experience.
REACH is a collaborative webVR platform for creating, remixing, and sharing volumetric VR.
Oculus Quill is a VR illustration and animation tool that allows users to paint in 3D layers.
Tilt Brush by Google is a simple, easily augmentable tool for 3D painting in cross-platform VR.
Magic Leap One
Magic Leap One is a spatial computer headset that allows you to create and project AR experiences.