Zappar - Zappar is a clever little app that can see and recognise images and objects in the world around us.
Vuforia SDK - Vuforia is a vision-based augmented reality software platform.
8th Wall - Cross-Platform Mobile AR
Google ARCore - Google Augmented Reality SDK
Geocaching - Geocaching is the premier app for locating geocaches. This app is available for both the Android and iOS platforms, and it makes locating these popular hidden treasures easy and fun.
ARToolKit - The world's most widely used tracking library for augmented reality.