Augmented Reality on the Web will be a great thing, but it just feels not ready yet. The principal tech companies are pushing hard for new standards and libraries, but the current Web AR state of the art is still experimental, and most of all, is not cross-browser. But on the Open Source ecosystem, thanks to the community, things are a bit different. There are projects that let you create Augmented Reality apps in ten lines of HTML(!). In this talk I will guide you on the discovery of free AR libraries to start develop Web AR applications on your own.