ProcessWire is a free PHP open source CMS with a great API built to save you time and make development fun at any scale. Developed by Ryan Cramer Design, LLC
License: Open Source
ProcessWire is a flexible and lightweight CMS that excels in custom content modeling and security, making it ideal for developers. In contrast, Joomla is a more robust platform with extensive extensions and user-friendly features, suitable for users looking for a balance between simplicity and functionality.