You don't have to work on the core to help expand CMS Made Simple; there is also the option to develop third-party modules. Many people work alone or in small groups developing the huge range of modules that CMSMS has available. Modules extend the functionality of the core system and are an essential part of nearly every CMSMS site. To get started, take a look at the Forge and see what other people are doing, download and inspect some popular modules to see how they work, and have a look at our Module Writing Tutorial pdf.