Simon Phipps discusses the 15-year evolution of the open source movement, outlining the five key forces driving open source forward today. ‘Today’s open source movement is more mature, and the trends underlining it are more nuanced and widely engaged. The revolution has had a meaningful impact, and to treat open source as if it is still about saving a few bucks on a software license or socking it to Microsoft is to misunderstand how far the open source movement has come. The following five trends are key drivers of today’s open source communities and projects. From governance to emerging revenue models, they paint a picture of an industry evolving to see the value of the freedoms at the heart of the open source movement.’