We were recently faced with a decision: either to let a program that took us one year to code die, simply because we do not have enough time to maintain it, or make it open source.Open source looked like a good idea for while, but there was one problem. We wanted to keep the software under our control and to be able to make money selling it later. And let us just be honest and admit it: we wanted monopoly over our software and why not? It took us one year to write the software, and its documenta.