I've just started looking into Oxwall and I like how simple yet versatile it is already out of the box. I have very specific needs though and will thus need to create a couple of plugins. With plenty of PHP experience, that shouldn't be a problem with some good resources. 

I already found the Plugin development crash course, which explains the general process very clearly. But it is merely an example of how to reach a specific goal. Is there also thorough documentation available of all resources, such as an overview of classes and their methods, hooks of the core, etc?