Fork is an Open Source Intuitive CMS is dedicated to creating a user friendly environment to build, monitor and update your website.
Fork is not only open source CMS, its jam-packed with cool apps. It’s comes with the territory of being a kick-ass Content Management System. And just in case you want even more, you can download additional apps to expand your site.

It is built with PHP (uses Spoon)-MySQL and there are various mature extensions offered like a form builder, blogging, location, analytics (integrates with Google Analytics) or newsletter.
A few number of high-quality themes are offered for free to easily get started and also learn how it integrates with HTML.
Fork is definitely not as feature-rich as WordPress or other popular alternatives but it is lightweight, promising and improved regularly.
Requirements: PHP 5.2+, MySQL 5+
Website: http://www.fork-cms.com/
Frontend Demo: http://demo.fork-cms.com/
Backend Demo: http://demo.fork-cms.com/private/
Login Information: User: demo@fork-cms.com – Pass: demo