Google ARCore - Google Augmented Reality SDK
Vuforia SDK - Vuforia is a vision-based augmented reality software platform.
ZapWorks - ZapWorks is the complete augmented reality toolkit for agencies and businesses who want to push the boundaries of creativity and storytelling.
ARToolKit - The world's most widely used tracking library for augmented reality.
Vuforia - Leading Augmented Rreality platform.
DroidAR - DroidAR is a framework for augmented reality on android devices with both location based AR and marker based AR.