Presentation for Software Freedom Day in Melbourne. In just a handful of years, volunteers around the world have create the largest encyclopedia ever known, Wikipedia. It's still growing today, in literally hundreds of languages, and sister projects to provide other free reference works (such as textbooks) are also thriving. But it would have never been possible without the products of the free software movement, and more importantly, the principles. Find out how these principles have inspired a host of related causes in recent years, and how the core idea of sharing continues to resonate not just in software, but also science, academia and education.