Top 2 content-services open source projects

Ulbora CMS is a self-contained CMS (no database needed) written in Golang. It uses a JSON datastore with content saved in both json files and in memory. You can download and upload a single binary backup file containing content, images, and templates as needed. It also has a built-in mail sender.

AppFlowy is an open-source alternative to Notion. You are in charge of your data and customizations. Built with Flutter and Rust.