Extending Rails with Plug-ins.

Rails ships with a rich set of features and powerful functionality. It΄s often said that Rails is designed to solve most problems most of the time. It can΄t solve all problems or be all things to all people, and it doesn΄t try to do that. Instead, it provides a mechanism to easily extend and augment the core functionality: plug-ins. Plug-ins give developers the freedom to write extensions to Rails without needing to include those additions in the Rails core code. [ABSTRACT FROM AUTHOR]