OneFileCMS is a flat, light, one file CMS (Content Management System) entirely contained in an easy-to-implement, highly customizable, database-less PHP script.

Coupling a utilitarian code editor with all the basic necessities of an FTP application, OneFileCMS can maintain a whole website completely in-browser without any external programs.

Some of the features are:

• Validating, semantic, and commented markup. Tested in FF, Safari, and IE7/IE8.
• Small footprint (24 kb)
• Possibly the easiest installation process ever
• All the basic features of an FTP application like renaming, deleting, copying, and uploading
• Gracefully degrading CSS and Javascript
• 100% re-brandable with title/footer text stored in variables and a modifiable filename

URL: http://onefilecms.com/

Constructr CMS is a new Content management System with a couple of modern Features: Clean URLs, Caching, NestedSets Page Tree, multilangual Backend,… just try – it is and will forever be freely available.

The list of the main features of Constructr looks like:

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Hippo CMS is an open source information centered content management system. It’s targetted at medium to large organisations managing content for multi-channel distribution like websites, intranets, PDAs and print (also called Enterprise Content Management). It facilitates an open and flexible way of using your information by following international accepted open standards. Hippo CMS is user friendly, has an open architecture and is designed for interoperability with existing environments.

Bricolage, an open-source enterprise-class content management system, greatly simplifies the complex tasks of creating, managing, and publishing the vast libraries of content essential to any organization. With advanced features such as fully-configurable workflows, customizable document types, multisite management capabilities, and comprehensive Perl- and PHP-based templating support, Bricolage has been designed from the ground-up to scale to meet the demanding needs of large organizations around the world.

Ariadne CMS is an Open Source, Multilingual Web Application Server and Content Management System built on PHP. Ariadne has a rich user interface which includes wizards, pulldown menus, and an extremely flexible and easy to use WYSIWYG editor. Ariadne has been used for anything from a personal website to an enterprise portal with more than a million pages of content. It can be used as a very friendly CMS, with almost no knowledge about CMS systems or HTML required, or a full featured enterprise portal with editorial workflow, staging, branding, etc.

Mephisto is a kick ass web publishing system. It’s a blog engine with some simple CMS-ish concepts (sections, pages), a very flexible templating system, and an aggressive caching scheme that takes advantage of your web server’s best traits. Mephisto’s core features include: a beautiful admin interface, Slick Asset Management, Flexible Liquid templating system, ATOM feeds, converters for wordpress, typo, movable type, dodgy xml-rpc api support and much more.

The gelato CMS is an open source content managament sytem built on AJAX, PHP and MySQL.

Citru CMS is a lightweight, highly versatile content management system aimed at web developers. Citru is created for developers. You must know a bit more to get it working, but instead you can stay in control. By editing content in it’s context you always know exactly what you’re changing and can immediately see the result. Instead of readymade templates Citru gives you full control over your layout. Build your site in html and put modules where you normally would have had content. The built in permissions system lets you set permissions on a module-instance or module-type basis. It also supports both users and groups.