This directory contains the Passenger main source code. There are source files written in various programming languages, including C++, Ruby and Javascript. Browse to a subdirectory for a README which explains that particular subdirectory. If you aren't familiar with the Passenger codebase then we encourage you to read these first: * [Contributors Guide](https://github.com/phusion/passenger/blob/master/CONTRIBUTING.md) * [Design & Architecture](https://www.phusionpassenger.com/documentation/Design%20and%20Architecture.html) * [Code walkthrough](http://vimeo.com/phusionnl/review/98027409/03ba678684)