This week's book giveaway is in the Other Languages forum. We're giving away four copies of Functional Reactive Programming and have Stephen Blackheath and Anthony Jones on-line! See this thread for details.
I have a Point Of Sale (openbravo pos) application which I downloaded from openbravo.com. it is a opensource project. I want to do few enhancements to it but problem is that I am finding difficult to understand application architecture. Application is written in java swing and I understand java but I need some help to understand on how to extend its functionality.