YunoHost
I used YunoHost to install CryptPad, FreshRSS, Nextcloud, and wallabag.
YunoHost is an operating system aiming for the simplest administration of a server, and therefore democratize self-hosting, while making sure it stays reliable, secure, ethical and lightweight. It is a copylefted libre software project maintained exclusively by volunteers.
Licensing: GNU Affero General Public License (AGPL) v3.0 (Source code)