Apache IoTDB
Device management, data collection, processing and visualization
Next generation AWS IoT Client SDK for Java
JetLinks is developed based on Java, Spring Boot, WebFlux, Netty
Open-source, scalable, and fault-tolerant MQTT broker
Java SDK for connecting to AWS IoT from a device
IoT Technical Guide - Building a High-Performance IoT Platform
An industrial strength open-source application platform for the IoT
Java MQTT client API and applications