Apache ActiveMQ
- activemq
- java
- amqp
- amqps
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HiveMQ CE is a Java-based open source MQTT broker that fully supports MQTT 3.x and MQTT 5. It is the foundation of the HiveMQ Enterprise Connectivity and Messaging Platform
Apache Artemis
- java
- apache
- messaging
- broker
Highly optimized, extremely modular and very flexible XMPP/Jabber server
- tigase
- xmpp
- server
- java
Qiscus provide everything you need to power up your app with chats. And it's now made simple.
- chat
- android-library
- android-sdk
- chatting