Camera2 Extensions API

Pro camera: The pro custom camera - Extensions - MIT App Inventor

Camera2 API: Overview

Camera2 Extensions API

Getting Started With CameraX Jetpack Support Library

Camera Extensions Android Open Source Project

App Inventor Extensions: Camera

Android Developers Blog: Snapchat integrated new camera features

Creating a camera extension with Core Media I/O

Samsung Galaxy Camera Ecosystem - Samsung Members

Snapchat integrated new features in camera 50% faster with Camera2