Maybe FrontAid CMS might be interesting to you, even though it is also proprietary. FrontAid CMS is similar to Forestry, but stores all your content in JSON ins

Maybe FrontAid CMS might be interesting to you, even though it is also proprietary. FrontAid CMS is similar to Forestry, but stores all your content in JSON instead of Markdown. It is therefore better applicable to (web) applications in addition to simple blogs. https://frontaid.io/ https://frontaid.io/