{"nonprofits" => "Can be a good fit for nonprofits with limited resources but who need a functional web presence.", "small_businesses" => "Ideal for small business owners who need a straightforward, easy-to-manage website.", "individual_projects" => "Suitable for individuals wanting to create personal or hobby sites.", "beginner_web_developers" => "Great for beginner web developers to familiarize themselves with a CMS due to its simplicity and community support."}
Sitecake - Drag and drop CMS for HTML websites. It's flat file CMS so it's pretty fast.
Anchor CMS - Free and lightweight blogging system
TYPO3 - TYPO3.com - Infos, SLAs, Extended Support Versions and more
Textpattern - Textpattern is an elegant content management system that is free, open source software.
Flextype - Flat-file content management system in PHP
ApostropheCMS - Apostrophe is a powerful website builder platform built on an enterprise open source CMS, offering in-context live editing, visual design tools, and multisite enablement in a full stack JS environment.