FuelPHP is an open source web application framework written in PHP which implements the HMVC pattern. Developed by iKreativ.com
License: Open Source
CodeIgniter is a lightweight and easy-to-use framework great for small to medium projects, while FuelPHP offers a more modular architecture suitable for larger applications with advanced features. While CodeIgniter excels in ease of use and community support, FuelPHP provides flexibility and performance for complex applications.