Fuel CMS is a flexible, easy-to-use Content Management System (CMS) built on the popular PHP web framework, CodeIgniter. Fuel CMS is designed to be an "opt-in" CMS, meaning it allows developers to create rich, custom-designed websites with the robustness of a CMS, without heavily restricting their coding and design practices. It is particularly well-suited for projects that start as fully custom websites but require a CMS to manage content.The CMS allows users to manage and update website content easily through a simple and intuitive interface. It provides fine-grained control over website components with features like inline editing and layout variables. For developers, it includes features such as advanced modular development capabilities, making it highly customizable and extensible. Moreover, Fuel CMS offers extensive documentation and a supportive community to help users maximize its functionalities.