Habari is a free and open source blog engine written in PHP and currently supports MySQL, SQLite and PostgreSQL for the database backend.
License: Open Source
Habari is a user-friendly platform primarily focused on blogging and content management, offering strong community support and customization options. In contrast, ExpressionEngine is a more robust CMS with advanced e-commerce capabilities and SEO tools, making it suitable for complex websites but potentially overwhelming for beginners.