Content management systems for SSG

BuhoCMS
https://github.com/iakmds/buhocms
https://flathub.org/ru/apps/org.buhocms.BuhoCMS
BuhoCMS is a local Content Management System for static site generators.

Hokus CMS
https://www.hokuscms.com/
https://github.com/julianoappelklein/hokus
Open source CMS for Hugo static websites
For content editors that want to manage content of small static websites using a sleek user-friendly interface.

Decap CMS
https://decapcms.org/
https://github.com/decaporg/decap-cms

Front Matter
https://frontmatter.codes/
https://github.com/estruyf/vscode-front-matter
Headless CMS right in your code editor
Front Matter is a CMS that runs within Visual Studio Code. It gives you the power and control of a full-blown CMS while also providing you the flexibility and speed of the static site generator of your choice like: Hugo, Jekyll, Docusaurus, NextJs, Gatsby, and many more...