The free licenses specify the principles of use and diffusion of the free software while supporting the open and collective innovation (Chesbrough, 2003). Often, the successes of the open-source community seem like an implausible form of magic (see the magic cauldron from Raymond [1999]). As Demazière, Horn, and Zune (2006) recall it, if open source projects can be regarded as virtual teams (Lipnack & Stamps, 2000), it should also be stressed that they seem like a true “enigma” in sociologists eyes. Open source rests on voluntary developers (Muffato) and does not function on modes of production framed by wage. Moreover these communities are not subjected to a strong planning of work but rather to a flexible calendar. What is the human resources (HR) secret management of open source project? In this article two main elements will be discussed: firstly the activity theory and HR and secondly the open source project and the organizational learning development.