Cloudron is "a complete solution for running apps on your server and keeping them up-to-date and secure." With a bit of basic server administration skills, Cloudron considerably simplifies the process of maintaining multiple free, open tools with integrated user accounts. Unlike Sandstorm, which deploys many of the same apps, the apps are not unified under a single interface. With Cloudron, they appear distinct.
Cloudron is not itself fully free/libre/open software. The frontend is closed-source.
This MediaWiki website runs on a Cloudron instance.