This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
I understand Plugins are small pieces of code or libraries(huge chunk of code) which does some
application specific functionality.
Normally they use plugins to extend the application functionality.
Ex: Browser based plugins.
Correct me if I'm wrong.