Documentation is probably one of the most important things you should spend time on. When I discovered Phalcon, the first thing that I did was to develop a simple API. When I needed to create documentation for my API, I found myself in a strange situation; there were just a few solutions out there, and most of them had dependencies. This was back in the summer of 2013 or so.
So, I decided to create my own API documentation generator, without any dependencies—just pure PHP. I am going to use this tool (it is publicly available on GitHub at https://github.com/calinrada/php-apidoc) to create and generate the API documentation for our project.