http://www.impresscms.org/

ImpressCMS is a community developed Content Management System for easily building and maintaining a dynamic website. Keep your website up to date with this easy to use, secure and flexible system.

https://sourceforge.net/projects/igamingcms/

iGaming CMS is a content management system designed for gaming websites. It uses PHP and MySQL.

http://www.icyphoenix.com/

http://hotarucms.org/

The most common use for Hotaru is social bookmarking With flexible plugins and themes, you can make any site you like

http://www.hnqcms.com/

Horizon QCMS is a Quick Content Management System for creative minds.

https://www.glfusion.org/

http://www.fork-cms.com/

Fork CMS is dedicated to creating a user-friendly environment to build, monitor and update your website. We take great pride in being the Content Management System of choice for beginners and professionals.

http://www.exponentcms.org/

Exponent is a website content management system (or CMS) that allows site owners to easily create and manage dynamic websites without necessarily directly coding web pages, or managing site navigation.

https://sourceforge.net/projects/embryocore/

http://www.elxis.org/

Elxis can be used in a wide range of platforms and operating systems. This document lists the minimum system requirements needed in order for Elxis to function properly.