Open source software are more and more observed (if not used) in the biological sciences field. They provide all the advantages of Open Source software, plus they bring needs for consensus on file formats, data representation and manipulation methods. I’ve just read a short article from Greg Wilson (in Nature) who is working with the Python Software Foundation “to develop a course that will teach scientists and engineers the 10% of software engineering they need to solve 90% of their problems”. Their goal is to “introduce them to some open-source tools and working practices that can reduce the amount of time they spend programming by up to 25%”. The course is already available here (Software Carpentry) … for free, of course!