Netlify CMS - An open-source CMS for your Git workflow
PHPRunner - PHPRunner builds visually appealing web interface for popular databases.
Cloud Cannon - Cloud Cannon turns Dropbox/Git-project into a CMS you can setup in seconds
Scriptcase - Powerful web low-code RAD platform. Unleash the power of web development and boost your productivity time creating delightful projects with magnificent BI solutions.
Sanity.io - Sanity.io a platform for structured content that comes with an open-source editor that you can customize with React.js.
AdminLTE - Web-based admin dashboard & control panel template. Highly customizable and easy to use.