APACHE 顶级项目:
http://activemq.apache.org/
http://kafka.apache.org/
http://zookeeper.apache.org/

ActiveMQ，RabbitMQ，KAFKA，阿里MQ

各种消息队列对比
http://wenku.baidu.com/link?url=En_vwBUiK4-xjkF9gXij7nAbJWDPEDjEtm9CKKxS3mnARAe4DtIBckgtfAL_KAQSmAxh3_8gAXPZ7CO07Mysyc7XYQHU_dHmriCdq6b4RV3

消息中间件的技术选型心得－RabbitMQ、ActiveMQ和ZeroMQ
http://www.cfanz.cn/?c=article&a=read&id=48103

阿里云mq:
https://www.aliyun.com/product/ons/

Kafka 对比 ActiveMQ
http://www.open-open.com/lib/view/open1425522959525.html
http://www.open-open.com/lib/view/open1433314737432.html

Kafka深度解析
http://blog.csdn.net/qqqq724/article/details/43228863/

JMS - JMS​应​用​领​域 应用场景
http://itindex.net/detail/49721-jms-jms-%E5%BA%94%E7%94%A8

ActiveMQ 使用场景
http://www.thinksaas.cn/group/topic/323861/

JMS与WebService应用场景
http://wangchengyong.iteye.com/blog/2031037

RPC，Webservice，RMI，JMS的区别
http://www.tuicool.com/articles/2qAzqq

Webservice RPC风格 SOAP,REST风格 各之间的对比
http://jayluns.iteye.com/blog/1980976

Nginx+tomcat进阶 -Java集群优化——dubbo+zookeeper构建高可用分布式集群
http://www.fwqtg.net/%E7%BD%AE%E9%A1%B6-java%E9%9B%86%E7%BE%A4%E4%BC%98%E5%8C%96-dubbozookeeper%E6%9E%84%E5%BB%BA%E9%AB%98%E5%8F%AF%E7%94%A8%E5%88%86%E5%B8%83%E5%BC%8F%E9%9B%86%E7%BE%A4.html

zookeeper在Dubbo中扮演了一个什么角色
http://www.zhihu.com/question/25070185