Imagine a world, a world in which the city we live consists of components that were designed and built by the population. Imagine a startup company that creates all the code as a self-development, without use of any commercial components In the past quarter of the century, our perception of how software projects develop has completely changed! I'd even say Who Moved My Cheese? In this talk I will present my view about of one of the main reasons for the change (positive change?) Development based open source community