1.aeron-io / aeron
Efficient reliable UDP unicast, UDP multicast, and IPC message transport
+369 stars
from 8,571 · score 5.91
Trending repositories
Ranked by Attention Score: stars gained over the last 180 complete days
14 repositories by Attention Score · May 7, 2026 – Nov 2, 2026 (UTC)
2.apache / rocketmq
Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.
+342 stars
from 22,304 · score 5.84
3.apache / pulsar
Apache Pulsar - distributed pub-sub messaging system
+223 stars
from 15,131 · score 5.41
4.apache / artemis
Apache Artemis
+58 stars
from 1,013 · score 4.08
5.apache / activemq
Apache ActiveMQ
+44 stars
from 2,418 · score 3.81
6.nats-io / nats.java
Java client for NATS
+28 stars
from 655 · score 3.37
7.hivemq / hivemq-community-edition
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
+23 stars
from 1,190 · score 3.18
8.allegro / hermes
Fast and reliable message broker built on top of Kafka.
+19 stars
from 854 · score 3.00
9.zeromq / jeromq
JeroMQ is a pure Java implementation of the ZeroMQ messaging library, offering high-performance asynchronous messaging for distributed or concurrent applications.
+18 stars
from 2,436 · score 2.94
10.spring-cloud / spring-cloud-stream
Framework for building Event-Driven Microservices
+13 stars
from 1,059 · score 2.64
11.tigase / tigase-server
Highly optimized, extremely modular and very flexible XMPP/Jabber server
+5 stars
from 353 · score 1.79
12.apache / incubator-heronArchived
Apache Heron (Incubating) is a realtime, distributed, fault-tolerant stream processing engine from Twitter
+4 stars
from 3,620 · score 1.61
13.joel-jeremy / emissary
Emissary is simple, yet 🗲FAST🗲 messaging library for decoupling messages (requests and events) and message handlers 🚀
+3 stars
from 107 · score 1.39
14.apache / qpid-broker-j
Mirror of Apache Qpid Broker-J
+2 stars
from 69 · score 1.10