guava

Event bus

• http://code.google.com/p/guava-libraries/wiki/EventBusExplained

• http://camel.apache.org/guava-eventbus.html

• http://tomaszdziurko.pl/2012/01/google-guava-eventbus-easy-elegant-publisher-subscriber-cases/

• 성능비교 자료 : http://codeblock.engio.net/?p=37

Google Collections

• http://code.google.com/p/google-collections/