관심있는 Open Source들

Distributed Messaging Service (JMS)
ActiveMQ - http://activemq.apache.org/

Application Server Framework
MINA - http://mina.apache.org/
Netty - http://www.jboss.org/netty
Thrift - http://incubator.apache.org/thrift/

Distributed System
Hadoop - http://hadoop.apache.org/, http://developer.yahoo.com/hadoop/
Zookeeper - http://hadoop.apache.org/zookeeper/

Web Server
Jetty - http://jetty.codehaus.org/jetty/
Tomcat - http://tomcat.apache.org/

Email Server
James - http://james.apache.org/