Vuforia SDK - Vuforia is a vision-based augmented reality software platform.
Google ARCore - Google Augmented Reality SDK
Wikitude AR SDK - Wikitude AR SDK helps you create breathtaking AR apps to capture the attention of your audience.
ARGear - The easiest way to add Snapchat-like AR features to your app
ARToolKit - The world's most widely used tracking library for augmented reality.
Apple ARKit - A framework to create Augmented Reality experiences for iOS